篇一：英语演讲小短文2分钟
幽默英语演讲小短文(2分钟的)
as food is to the body, so is learning to the mind. our bodies grow and muscles develop with the intake of adequate nutritious food. likewise, we should keep learning day by day to maintain our keen mental power and expand our intellectual capacity. constant learning supplies us with inexhaustible fuel for driving us to sharpen our power of reasoning, analysis, and judgment. learning incessantly is the surest way to keep pace with the times in the information age, and an infallible warrant of success in times of uncertainty.
determination to sweep away obstacles to our success and strangling our desire for the refinement of our character. lack of learning will inevitably lead to the stagnation of the mind, or even worse, its fossilization, therefore, to stay mentally young, we have to take learning as a lifelong career.
学习之于心灵，就像食物之于身体一样。摄取了适量的营养
食物，我们的身体得以生长而肌肉得以发达。同样地，我们应该日复一日不断地学习以保持我们敏锐的心智能力，并扩充我们的智力容量。不断的学习提供我们用不尽的燃料，来驱使我们磨利我们的推理、分析和判断的能力。持续的学习是在信息时代中跟时代并驾齐驱的最稳当的方法，也是在变动的世代中成功的可靠保证。
一旦学习停止，单调贫乏的生活就开始了。视学校为汲取知识的唯一场所是种常见的谬误。相反地，学习应该是一种无终止的历程，从生到死。由于世界一直快速地在变动，只要学习停顿数日就将使人落后。更糟的是，蛰伏在我们潜意识深处的兽性本能就会复活，削弱我们追求高贵理想的意志，弱化我们扫除成功障碍的决心，而且扼杀我们净化我们人格的欲望。缺少学习将不可避免地导致心灵的停滞，甚至更糟地，使其僵化。因此，为了保持心理年轻，我们必须将学习当作一生的事业。
2．heavy schoolwork【课业繁重】
in my opinion, the schoolwork now being assigned to high school students is too heavy. while it is true that students need to study, they need other things as well if they are to grow into healthy and well-rounded adults. high should be allowed more time for play. playing is not wasting time, as some think. it gives them physical exercise, and also exercise their imagination. which tends to be stifled by too much study. finally, the pressure put on high school students by excessive schoolwork can cause
serious stress, which is unhealthy physically and mentally. i do not advocate the elimination of schoolwork. i do think, however, that a
reduction of the current heavy load would be beneficial to students and to the society as a whole.
我认为目前高中生的课业实在太重了，虽然说学生的确应当念书，但是要想长大成为健全的人，他门还需要一些其它的东西，所以应该给高中生较多从事娱乐的时间。娱乐并不如某些人所想的，是在浪费时间，它可以让学生锻炼身体，发挥被繁重课业扼杀的想象力。此外，繁重的课业加诸在高中生身上的压力可能引起严重的情绪紧张，这对身心都有害。我并非主张废除学校课业，但是我认为减轻目前繁重的课业对于学生和整个社会都是有益的。
3．time【时间】
lost time is never found again. this is something which i learned very clearly last semester. i spent so much time fooling around that my grades began to suffer. i finally realized that something had to be done. it was time for a change.
now i have a new plan for using my time wisely. i have set my alarm clock ahead half an hour. this will give me a head start on the day. i have also decided to keep a log of what i do and when i do it. looking back on what i’ve done will give me some ideas on how to reorganize my time. 时光一去不复返，这是我上学期清楚学到的教训。我浪费很
多时间四处游荡，以致于我的成绩开始退步。最后我终于了解到我必须有所作为；该是痛改前非的时候了。
现在我有一个明智运用时间的新方法。我已将闹钟早拨半小时，这将使我这一天的作息提前开始。我也决定将我所做的一切及做这些事的时间记录下来。回顾我所做的事情会启发我如何重新安排我的时间。
4．work and play【工作与娱乐】
来说，适度的娱乐活动能提供各种管道，来渲泄你被压抑的情绪，减轻单调生活中的紧张与不悦。
放学之后，我最常做的休闲活动，便是慢跑与看电影。通常我并不特地拨出时间来做运动，但是我很重视学校的体育课。在操场上慢跑几圈，无疑地可以减轻一天的压力。在周末时，我都去看早场电影，享受视觉飨宴。如此一来，我将有如再生般的充沛活力，去面对下一星期的工作量。
5．my first job【我的第一份工作】
my first job was at a cramming school. it was three years ago when i just graduated from junior high school and finished the entrance
examination. since i had nothing to do that summer, i decided to find a job, tasting the joy of independence.
i was responsible for answering the telephone and taking the message. i worked eight hours a day, six days a week. the work was not difficult nor heavy to me and i guess i did well. the most delighted thing was perhaps that i could spend the money i earned all by myself.
我的第一份工作是在一家补习班做事。那是三年前我刚从国中毕业，考完联考时的事了。既然我那整个夏天都闲着没事，倒不如找份差事，尝尝独立赚钱的快乐。
我负责接听电话且纪录留言的工作。我一天工作八小时，一星期工作六天。那份工作对我而言既不困难亦不沉重，所以我想我还满称职的。而最令人快乐的事大概莫过于花全部由自己篇二：幽默英语演讲小短文(2分钟的)
as food is to the body, so is learning to the mind. our bodies grow and muscles develop with the intake of adequate nutritious food. likewise, we should keep learning day by day to maintain our keen mental power and expand our intellectual capacity. constant learning supplies us with inexhaustible fuel for driving us to sharpen our power of reasoning, analysis, and judgment. learning incessantly is the surest way to keep pace with the times in the information age, and an infallible warrant of success in times of uncertainty.
学习之于心灵，就像食物之于身体一样。摄取了适量的营养食物，我们的身体得以生长而肌肉得以发达。同样地，我们应该日复一日不断地学习以保持我们敏锐的心智能力，并扩充我们的智力容量。不断的学习提供我们用不尽的燃料，来驱使我们磨利我们的推理、分析和判断的能力。持续的学习是在信息时代中跟时代并驾齐驱的最稳当的方法，也是在变动的世代中成功的可靠保证。
一旦学习停止，单调贫乏的生活就开始了。视学校为汲取知识的唯一场所是种常见的谬
误。相反地，学习应该是一种无终止的历程，从生到死。由于世界一直快速地在变动，只要学习停顿数日就将使人落后。更糟的是，蛰伏在我们潜意识深处的兽性本能就会复活，削弱我们追求高贵理想的意志，弱化我们扫除成功障碍的决心，而且扼杀我们净化我们人格的欲望。缺少学习将不可避免地导致心灵的停滞，甚至更糟地，使其僵化。因此，为了保持心理年轻，我们必须将学习当作一生的事业。
2．heavy schoolwork【课业繁重】
in my opinion, the schoolwork now being assigned to high school students is too heavy. while it is true that students need to study, they need other things as well if they are to grow into healthy and well-rounded adults. high should be allowed more time for play. playing is not wasting time, as some think. it gives them physical exercise, and also exercise their imagination. which tends to be stifled by too much study. finally, the pressure put on high school students by excessive schoolwork can cause serious stress, which is unhealthy physically and mentally. i do not advocate the elimination of schoolwork. i do think, however, that a reduction of the current heavy load would be beneficial to students and to the society as a whole.
我认为目前高中生的课业实在太重了，虽然说学生的确应当念书，但是要想长大成为健全的人，他门还需要一些其它的东西，所以应该给高中生较多从事娱乐的时间。娱乐并不如某些人所想的，是在浪费时间，它可以让学生锻炼身体，发挥被繁重课业扼杀的想象力。此外，繁重的课业加诸在高中生身上的压力可能引起严重的情绪紧张，这对身心都有害。我并非主张废除学校课业，但是我认为减轻目前繁重的课业对于学生和整个社会都是有益的。
3．time【时间】
lost time is never found again. this is something which i learned very clearly last semester. i spent so much time fooling around that my grades began to suffer. i finally realized that something had to be done. it was time for a change.
now i have a new plan for using my time wisely. i have set my alarm clock ahead half an hour. this will give me a head start on the day. i have also decided to keep a log of what i do and when i do it. looking back on what i’ve done will give me some ideas on how to reorganize my time. 时光一去不复返，这是我上学期清楚学到的教训。我浪费很多时间四处游荡，以致于我的成绩开始退步。最后我终于了解到我必须有所作为；该是痛改前非的时候了。
现在我有一个明智运用时间的新方法。我已将闹钟早拨半小时，这将使我这一天的作息提前开始。我也决定将我所做的一切及做这些事的时间记录下来。回顾我所做的事情会启发我如何重新安排我的时间。
4．work and play【工作与娱乐】
what i usually do to relax after school is jogging and seeing movies. usually i dont spare time for exercise, but i value the physical education class at school. jogging several rounds in the field certainly relieves the days pressure. on weekends, ill catch the morning movie for my visual enjoyment. i feel revived and energetic for another weeks work-load.
工作与娱乐并不互相冲突，事实上，它们之间的关系还相辅相成。有句格言说：「整日工作而没有休闲娱乐，会令人变得沉闷乏味。」被工作重担压得喘不过气来的生活，将使你一事无成，因为你将对一成不变的例行公事感到厌烦。由另一方面来说，适度的娱乐活动能提供各种管道，来渲泄你被压抑的情绪，减轻单调生活中的紧张与不悦。
放学之后，我最常做的休闲活动，便是慢跑与看电影。通常我并不特地拨出时间来做运
动，但是我很重视学校的体育课。在操场上慢跑几圈，无疑地可以减轻一天的压力。在周末时，我都去看早场电影，享受视觉飨宴。如此一来，我将有如再生般的充沛活力，去面对下一星期的工作量。
5．my first job【我的第一份工作】
my first job was at a cramming school. it was three years ago when i just graduated from junior high school and finished the entrance examination. since i had nothing to do that summer, i decided to find a job, tasting the joy of independence.i was responsible for answering the telephone and taking the message. i worked eight hours a day, six days a week. the work was not difficult nor heavy to me and i guess i did well. the most delighted thing was perhaps that i could spend the money i earned all by myself.
我的第一份工作是在一家补习班做事。那是三年前我刚从国中毕业，考完联考时的事了。既然我那整个夏天都闲着没事，倒不如找份差事，尝尝独立赚钱的快乐。
我负责接听电话且纪录留言的工作。我一天工作八小时，一星期工作六天。那份工作对我而言既不困难亦不沉重，所以我想我还满称职的。而最令人快乐的事大概莫过于花全部由自己赚来的钱了！
6．my favorite sports【我最喜爱的运动】
sports help everyone to keep healthy, happy, and efficient. so i pay special attention to games, especially table-tennis. table tennis is my favorite game. i play it almost every day.
table-tennis is an ideal game us because it brings the whole body into action. it strengthens our muscles, expands our lungs, promotes the circulation of the blood, and causes a healthy action of the skin. besides, it is very amusing and does not cost us much money. table-tennis is very
moderate; it is not so rough as football. it is an indoor game and can be played even on rainy days. thus, it is my favorite kind of exercise.
运动能帮助每一个人保持健康、快乐和有效率。所以我特别重视运动，特别是桌球，桌球是我最喜欢的运动。我几乎每天玩。
桌球对我们而言，是一项理想的运动，因为它可以使我们全身运动，它可以增强我们的肌肉，扩张我们的肺部，促进血液循环，并且使肌肤产生健康作用，此外，它很有趣而且所费不多。桌球是相当温和适中的，它不像足球那么粗野。它是一种室内运动，甚至在下雨天也能玩。因此，桌球是我最喜爱的一种运动。篇三：幽默英语演讲小短文(2分钟的)
as food is to the body, so is learning to the mind. our bodies grow and muscles develop with the intake of adequate nutritious food. likewise, we should keep learning day by day to maintain our keen mental power and expand our intellectual capacity. constant learning supplies us with inexhaustible fuel for driving us to sharpen our power of reasoning, analysis, and judgment. learning incessantly is the surest way to keep pace with the times in the information age, and an infallible warrant of success in times of uncertainty.
学习之于心灵，就像食物之于身体一样。摄取了适量的营养食物，我们的身体得以生长而肌肉得以发达。同样地，我们应该日复一日不断地学习以保持我们敏锐的心智能力，并扩充我们的智力容量。不断的学习提供我们用不尽的燃料，来驱使我们磨利我们的推理、分析和判断的能力。持续的学习是在信息时代中跟时代并驾齐驱的最稳当的方法，也是在变动的世代中成功的可靠保证。
一旦学习停止，单调贫乏的生活就开始了。视学校为汲取知识的唯一场所是种常见的谬误。相反地，学习应该是一种无终止的历程，从生到死。由于世界一直快速地在变动，只要学习停顿数日就将使人落后。更糟的是，蛰伏在我们潜意识深处的兽性本能就会复活，削弱我们追求高贵理想的意志，弱化我们扫除成功障碍的决心，而且扼杀我们净化我们人格的欲望。缺少学习将不可避免地导致心灵的停滞，甚至更糟地，使其僵化。因此，为了保持心理年轻，我们必须将学习当作一生的事业。
2．heavy schoolwork【课业繁重】
我认为目前高中生的课业实在太重了，虽然说学生的确应当念书，但是要想长大成为健全的人，他门还需要一些其它的东西，所以应该给高中生较多从事娱乐的时间。娱乐并不如某些人所想的，是在浪费时间，它可以让学生锻炼身体，发挥被繁重课业扼杀的想象力。此外，繁重的课业加诸在高中生身上的压力可能引起严重的情绪紧张，这对身心都有害。我并非主张废除学校课业，但是我认为减
轻目前繁重的课业对于学生和整个社会都是有益的。
3．time【时间】
lost time is never found again. this is something which i learned very clearly last semester. i spent so much time fooling around that my grades began to suffer. i finally realized that something had to be done. it was time for a change.now i have a new plan for using my time wisely. i have set my alarm clock ahead half an hour. this will give me a head start on the day. i have also decided to keep a log of what i do and when i do it. looking back on what i’ve done will give me some ideas on how to reorganize my time.
时光一去不复返，这是我上学期清楚学到的教训。我浪费很多时间四处游荡，以致于我的成绩开始退步。最后我终于了解到我必须有所作为；该是痛改前非的时候了。
现在我有一个明智运用时间的新方法。我已将闹钟早拨半小时，这将使我这一天的作息提前开始。我也决定将我所做的一切及做这些事的时间记录下来。回顾我所做的事情会启发我如何重新安排我的时间。
4．work and play【工作与娱乐】
what i usually do to relax after school is jogging and seeing movies. usually i dont spare time for exercise, but i value the physical education class at school. jogging several rounds in the field certainly relieves the days pressure. on weekends, ill catch the morning movie for my visual enjoyment. i feel revived and energetic for another weeks work-load.
工作与娱乐并不互相冲突，事实上，它们之间的关系还相辅相成。有句格言说：「整日工作而没有休闲娱乐，会令人变得沉闷乏味。」被工作重担压得喘不过气来的生活，将使你一事无成，因为你将对一成不变的例行公事感到厌烦。由另一方面来说，适度的娱乐活动能提供各种管道，来渲泄你被压抑的情绪，减轻单调生活中的紧张与不悦。
放学之后，我最常做的休闲活动，便是慢跑与看电影。通常我并不特地拨出时间来做运动，但是我很重视学校的体育课。在操场上慢跑几圈，无疑地可以减轻一天的压力。在周末时，我都去看早场电影，享受视觉飨宴。如此一来，我将有如再生般的充沛活力，去面对下一星期的工作量。
5．my first job【我的第一份工作】
my first job was at a cramming school. it was three years ago when i just graduated from junior high school and finished the entrance examination. since i had nothing to do that summer, i decided to find a job, tasting the joy of independence.
篇二：20篇你需要的两分钟英语演讲
第六篇 热核反应
能源是社会发展和进步的基石。如今，地球能源正面临严重短缺。煤、石油、天然气等天然能源矿藏的存量有限，随着人类多年的开采已经所剩无几。且不说这些宝贵的化工原料仅作为燃料使用所造成的极大浪费，就是谈到燃烧矿石燃料对环境所造成的严重污染和温室气体效应等后果，也让人们对直接消费这些天然能源再三反思。长期以来，人类一直在苦苦找寻体量大、污染少的新能源，以维持人类社会的持续发展。自从原子弹被研制成功并显示其巨大的威力后，立即引起了科学界对开发这种新能源——核能的巨大兴趣。
6.1核能的利用
20世纪后半叶，核能的开发利用在世界范围内出现热潮，各种类型的核电站（也称作核反应堆）得到了异常迅速的发展。随着改革开放和国民经济发展的需要，我国也先后建成了数个核电站。但目前全世界所有核电站的原理，都是利用铀等大原子量的重核裂变成较轻的核而释放能量，也就是原子弹的反应机理。此类核裂变电站具有极大的运行安全风险和原料开采、处理以及反应后废料储藏、处理过程的极大核污染风险。15年前的乌克兰切尔诺贝利核电站、稍后的美国三里岛以及日本等都发生过极其严重的核事故灾难，至今还常有这些事故后遗症影响的报道见诸报端。其所依赖的核裂变原料铀不仅开采处理的过程非常困难和危险，就其在地球上的储量来说，也极其有限，因此，它远非是人们所希望的新能源。
而另一种核能，核聚变能，它很不同于我们在现存的核电站所利用的核能形式。正如现有核电站的发电机理是原子弹爆炸一样，利用核聚变能所建成的核电站的核能机理是热核氢弹。它是在当两个轻核聚合成一个较重的核时释放出巨大的能量。尽管同是核反应，聚变和裂变却有着极大的不同。由于要使两个轻核发生聚合必须克服巨大的排斥静电势，由实验资料得出，为使两个氘核相遇，它们间的相对速度必须大于每秒700公里，在如此高速下的氘核早已成为温度在5千万℃以上的物质的第四态——等离子体了。这也是我们把聚变称为热核反应的原因。
太阳是一个由高温等离子体组成的巨大能量源泉，它的光和热都是来源于经
久不熄的热核聚变反应。如果实现人工控制下氢元素的核聚变反应即受控热核反应，那么在地球上同样可以创造出一个个具有不竭能量的人造太阳。利用氢的同位素氘和氚的原子核实现核聚变的热核反应堆，人类在地球上可以建造类似于太阳上的热核聚变而放出能量的新能源装置。这种装置所提供的能源，不仅极少污染，而且廉价，资源无限，因此它是永久性解决人类能源问题的唯一途径，单靠海水为原料进行核聚变反应，就能满足人类100亿年的用电需求。
研究核聚变有两种途径，一种是磁约束类型，一种是惯性约束类型，托卡马克属于前者。50多年来，全世界共建造了上百个托卡马克装置，其中包括中国建造的大小不等的十多个此类装置。随着装置技术性建设的发展和实验结果的推动，科学家和工程师们追求先进形式的托卡马克装置，以获得更加理想的结果，更加接近核聚变反应堆的目标。全超导托卡马克的建造就是在这样的理念下应运而生的。
6.2托卡马克磁约束装置
聚变核反应是一种非常理想的潜在新能源，近年来，磁约束聚变在托卡马克类型的装置上取得了突破性的进展，从而开发聚变能的科学可行性终于在托卡马克上得到了证实。正因为此，一个国际热核聚变工程实验堆（ITER）正在进行工程设计，其聚变输出功率可达1500MW。
HT-7U超导托卡马克是国家“九五”大科学工程， 它是一个具有非园截面的大型超导托卡马克装置。纵场电源是一个大容量高稳定度全控整电源，极向场电源满足建立等离子体和感应加热所要求的磁通变化及波形要求，并实现对等离子体电流、位移、形状和电流分布等的控制。
6.2.1核聚变与等离子体
质量数很小的两个适当的原子核在一定条件下重新组合成一个质量数较大的原子核，会释放出能量，这就是人类利用核能的另一重要途径即核聚变的理论依据。
1929年，有人提出太阳中产生能量的过程就是质子的聚变反应。这些反应能在温度高达15×106K的太阳中心发生。
聚变反应所需的原料直接或间接地都是氘核（D）。单位质量的氘聚变所放出的能量是单位质量235U裂变所放出能量的4倍左右。这是聚变核反应作为一
种潜在的新能源的突出优点之一。核反应是在原子核的热运动中发生的，所以称为热核反应，如果这种反应能够加以控制，则称为受控热核反应。计算得知温度达到108K-109K就可以发生聚变反应。要实现作为潜在能源的核聚变反应，只能通过高温等离子体的方法。在高温等离子体中氘核和电子处在几乎相同的高温状态中。而且，在等离子体中，氘核与电子作无规热运动，互相不断地碰撞着。因此，可以说高温等离子体物理学是核聚变的理论基础。
作为一种能源的核聚变反应堆，不仅要求等离子体的温度必须高到使离子能够克服彼此之间的库伦斥力而相互碰撞发生聚变反应，并且要求从等离子体发生聚变反应中释放的能量必须大于用以产生和维持高温等离子体所需的能量。劳逊作了核聚变等离子体中的能量平衡计算，设等离子体的密度为n，加热到温度T，该高温等离子体维持时间为τ。对于氘氘（D-T）反应，当等离子体温度为10keV时，实现能量收支平衡的nτ值是1020m-3s，如果实验上达到了劳逊判据要求的参考值，那就证明了核聚变的科学可行性。当Ti=30 keV时，nτ大约为
1.5×1020m-3s，达到了热核点火条件。
6.2.2磁约束托卡马克装置
核聚变等离子体温度极高，带电粒子的动能10 keV相当于温度108K(1eV=11600K)。磁约束就是利用磁场来将高温等离子体约束在一定的区域内（见图1），使之达到劳逊条件所要求的参数范围。
磁场对等离子体的约束能力在于磁场与等离子体之间有相互作用力。这些作用力包括三个方面，即磁场对等离子体中每个带电粒子的“洛伦兹力”；以及由此对等离子体产生的宏观效果磁应力；当等离子体中有电流通过时，除外加磁场产生的作用力外，电流本身产生的磁场还会产生一种箍缩力。
6.2.3 EAST全超导托卡马克完成首次工程调试
由我国自行设计、研制的世界上第一个全超导托卡马克 EAST(原名HT-7U)核聚变实验装置，于2月1日到3月17日成功进行了首次工程调试。本次工程调试的主要目的是检验主机的性能以及相关分系统的能力，探索未来可行的运行模式，测量主机和主要分系统的关键技术参数，验证各种安全保护系统的可靠性, 为年内成功运行提供必要的数据和积累经验。在调试中，最受关注的低温调试和磁体通电测试获得圆满成功。
在真空和低温条件就位后，从3月13日到3月得离子体所的相关人员对纵场磁体和12个极向场磁体分别进行了260 次通电测试。最长通电时间达到5000秒，最大电流达到8200安培，相对应的装置中心场强已达到2特斯拉。总控系统、真空系统、低温系统、数据采集系统、水冷系统、电源系统、装置技术诊断系统、失超保护、真空磁位形测量系统、超导传输线、高温超导电流引线、铜电流引线以及等离子体控制系统运行正常，保证了通电测试的安全和成功。
图3 EAST(原名HT-7U)全超导托卡马克实验装置
“EAST(原名HT-7U)全超导托卡马克实验装置”是国家“九五”大科学工程，其开工报告于2000年10月获国家发改委正式批准。EAST装置集全超导和非圆截面两大特点于一身，且具有主动冷却结构，它能产生稳态的、具有先进运行模式的等离子体，国际上尚无成功建造的先例。等离子体所的科技人员经过5年多的自力更生、自主创新和艰苦奋斗，在2005年底基本完成了主机总装以及各分系统的研制和安装工作。他们解决了包括大型超导磁体研制与测试等许多超导托卡马克建设过程中的重大科学和技术问题，获得了一系列具有自主知识产权的、可对国民经济产生重要作用的高新技术。EAST的建设使中国聚变研究向前迈出
了一大步，赢得了国内外同行的敬佩和高度关注。
6.3核聚变反应的研究和政治
随着中国、日本、韩国、俄罗斯、美国和欧盟6大ITER成员国6月28日在莫斯科敲定法国的卡达拉舍（Cadalache）为反应堆建设地，这一为期30年、共计投资将超过100亿欧元的国际超大型科学合作项目很快就将正式启动。“ITER”——拉丁文“道路”之意——是否真能为人类另辟蹊径，整个世界都在期待。酷暑严冬、暴风山洪??被现代人类“剥削”的地球也在以自己的方式报复着人类。然而与生态气候所遭受的破坏相比，能源衰竭受到了更为广泛和急迫的关切。
实际上，宇宙中最常见的就是氢元素的聚变反应，所有的恒星几乎都在燃烧着氢。利用氢原子最容易实现的聚变反应是其同位素氘（读音刀，deuteri－um）与氚（读音川，tritium）的聚变。氘和氚发生聚变后，2个原子核结合成1个氦原子核，并放出1个中子和17.6兆电子伏特能量。每1升海水中含30毫克氘，30毫克氘聚变产生的能量相当于300升汽油，就是说，“1升海水等于300升汽油”。地球上海水中有45万亿吨氘，足够人类使用60亿年。ITER走向人间政治角力让ITER一波三折
事实上早在二战时期人类就早已实现了氘-氚聚变―――氢弹。但它比原子弹更具毁灭性和不可控性。如何将氢弹爆炸过程用人为手段大大减缓，其反应能量被缓慢而稳定地输出？这成为科学家们半个多世纪来为之奋斗的目标。
上个世纪50年代初，美国和苏联率先开始秘密地独立研究可控核聚变，然而随着研究的深入，理论和技术上遭遇的一个个障碍让各国认识到，只有开展广泛的国际合作才是加速实现核聚变能利用的唯一可行之路。热核聚变技术也成为冷战时期各国仍旧保持互通有无的特例。
1985年，美国总统里根和苏联领导人戈尔巴乔夫在一次首脑会议上提议，要求“在核聚变能方面进行最广泛的、切实可行的国际合作”。美苏两国首脑随后又与核技术领域处于领先地位的法国的总统密特朗进行了几次高层会晤，支持在国际原子能机构（IAEA）主持下，进行国际热核实验反应堆，即ITER的概念设计和辅助研究开发方面的合作。
1987年，IAEA邀请欧共体（欧盟前身）、美国、苏联、加拿大和日本的代表在维也纳开会并达成协议，五方合作设计建造国际热核实验反应堆，并由此诞生
篇三：两分钟的英语演讲稿
两分钟的英语演讲稿
I'll tell you an experience of myself happened last week. Last Thursday our school was tackling something about working for study. i wanted to have a try even though i knew the salary was so low and i had little chance,because the students who had the certificate were always thought to have priority to get the job. fortunately i was called at noon and a teacher said to me that she wanted me to work for her and asked if i could change my mind. at that moment i was so excited that immediately i accepted her idea. but later on,she found me that i'm not a student,so i had little chance and suggest me to get one. then an idea occurred to me that i could call my father and ask him to send me the letter. at the same time i was told that i was admitted to the job and don't need the certificate. that time i forgot to remind my father,until the next day he called me that he had posted it and it would arrive in just one day. at that moment i was moved, and even moved into tears, because i knew my father was injured not long before,the process of helping me with the affairs was not so convenient for him. but he tried his best to help me. sometimes we may complain about unsatisfying things around us,and blame them on our parents,sometimes they'll be angry with us, and sometimes we can't quite understand what they are thinking about. but on balance, almost every parent is selfless to his or her child. they are ready to offer everything to us when we are in bad situation. we used to sharing sorrow with them,but do not forget to share our happiness with them, perhaps they will be much happier than we are. so from now on, let's care more about our parents and do not leave pity to them. that's what i want to tell you today. thank you!
中学生感恩英语演讲稿
the poet said: spring flowers to the door pushed open 。 i said: thanks
giving to the door pushed open the living. if you carefully listen to the voices of flowers, are everywhere harmonious life movement.
诗人说：花朵把春天的门推开了。我说：感恩把生活的门推开了。只要你用心去听花开的声音，生活到处都是和谐的乐章。
then, as a middle school student, how thanksgiving?
那么，作为一名中学生，怎样感恩呢？
first thanksgiving their parents, because everyone's life is a continuation of the parents of one blood, all of the parents gave us love, let us enjoy the human world of affection and happiness, therefore, we would like to thank the parents.
首先要感恩自己的父母，因为每个人的生命都是父母血脉的延续,父母给了我们全部的爱,
让我们享受到了人世间的亲情和幸福，因此,我们要感谢父母。
teachers are our growth领路人, are our friends, teachers care for us , their words and deeds, let us benefit for life, we pay for teachers efforts and sweat, we should thanksgiving teachers.
老师是我们成长的领路人，是我们的朋友，老师爱护我们，言传身教，让我们受益终身，老师为我们付出心血和汗水，我们应该感恩老师。
students study the lives of our fellow students to encourage each other, help each other, to jointly overcome difficulties and setbacks, the common taste of success and happiness learning, we should be grateful for every day and we accompanied the students.
同学是我们学习生活的同伴，同学间互相鼓励，互相帮助,共同战胜困难与挫折，共同品尝学习的成功与快乐，我们应该感谢天天与我们相伴的同学。
thanksgiving-fighting, thanksgiving unlimited! students, and society thanksgiving! let us always to the life caring and full of love and love!
感恩无痕，感恩无限！同学们，学会感恩吧！让我们的生活永远走向关怀，充满真情和爱心！
高中英语演讲稿：怎样才能学好英语
as everyone knows,english is very important today.it has been used
everywhere in the world.it has become the most common language on internet and for international trade. if we can speak english well,we will have more chance to succeed.because more and more people have taken notice of it,the number of the people who go to learn english has increased at a high speed.
but for myself,i learn english not only because of its importance and its usefulness,but also because of my love for it.when i learn english, i can feel a different way of thinking which gives me more room to touch the world.when i read english novels,i can feel the pleasure from the book which is different from reading the translation.when i speak english, i can feel the confident from my words.when i write english,i can see the beauty which is not the same as our chinese... i love english,it gives me a colorful dream.i hope i can travel around the world one day. with my good english, i can make friends with many people from different contries.i can see many places of great intrests.i dream that i can go to london,because it is the birth place of english.
i also want to use my good english to introduce our great places to the english spoken people,i hope that they can love our country like us.
i know, rome was not built in a day. i believe that after continuous hard study, one day i can speak english very well.
if you want to be loved, you should learn to love and be lovable. so i believe as i love english everyday , it will love me too.
i am sure that i will realize my dream one day!
thank you!
中学生三分钟英语演讲稿
good morning,dear teacher and my friends.
it’s a very intresting topic today.
i think my dad was a hero for me when i was a young child. we'd go fishing, walks, and other fun things for a kid.
every child has a good and great father, and so do i. my dad played a very important role in my daily life`````exactly speaking, in my past 16 years.
my father always stands in the center of my life， from past till now and possibly in the future.
my family was rather poor when i was in my childhood. we didn't have our own house and had to live in a shabby， small room rented from my father's factory. the room was so small that there was little space for people to walk. i didn't have my own bed and had to sleep with my parents. this is terrible both for my parents and me.
but father made this all different！he works very hard on his own business, now we have our own 2 housese,surly,i have my own room.and he take our family so much happiness, richer and richer.
when i was little, i did everything with my dad. you could always find me sitting on his knee or walking and doing everything with him. every night he would read me a bed time story and make the voices of each character.
i learnt a lot from my daddy. i learnt to never take things to seriously and to always smile.
like many other fathers, my dad and i also has generation gap. he is not good at or even can’t work the computer. so when i sitting at the computer desk,he will say something like ‘you should pay more attention to your study’, ‘don’t waste time on the computer games’ , ‘it will be bad for your eyes’ and so on. how can i- a computer fan – reduce time on computer? so i continue studying and playing on it
years pasted, my father is over 45 now. it is time for me to look after him and i
am sure i will do and we will live an even better life. and i will say,i really love you dad,cause you are the hero in my mind.
thank you so much!
Say No to Junk food
Good morning, everybody!
Boys and girls, please raise you hand
If you don’t like fried chicken wings.(你可现场问问题)
How about double cheese burger?
Raise you hands if you don’t like French fries.
I can see so many people like fried chickens, double cheese burgers and French fries.
Now let me ask you one more question:
Raise you hands if you like junk food.
I can see that nobody likes junk food. Right?
Boys and girls, do you realize that the one you were in favor just now are junk foods.
Junk food is a slang word for foods with limited
Nutritional value.
Foods that are high in salt, sugar, fat or calories and low nutrient content. are junk foods.
Boys and girls, listen up!
junk foods may cause hypertension
Junk foods may increase various kinds of cancer, cardiovascular disease, diabetes, and obesity Boys and girls, I am not standing here to scare you
Eating healthy foods should start from the young
So let us start from today
Let us say no to junk food
Boys and girls, it is not a matter how long you could live
It is the quality of life that counts!
God bless everybody! Bye!
Ladies and gentlemen, good morning.
It’s my great honor to be here and I am very happy to see you all. Thank you for being here. What I am going to talk about today is how to speak good English.
First of all, I’d like to talk about the importance of speaking good English and share my experience in learning English with you. As you know, English has become an international language. Wherever you go, English is always commonly used. It is convenient to know the language. At the same time,
English may be the most important factor in deciding which countries are leaders in the future. The language of the most advanced management and technology is undoubtedly English. Being able to absorb this information is really the key to the new century. In the 21century. We can’t go there and speak our own language because nobody is going to learn it in order to
understand us. Our Asian rival, India, has surged ahead of other developing countries in information technology because of its superior English skills.
Unless we are able to master English, we will not be able to get our population to use IT and take advantage of the new economy. There is an urgent need to have a workforce which is proficient in the language in view of the information technology onslaught.
Second, about learning English, I think laying a strong foundation is the first and most important step. In other words, you should read and speak English every day. Memorizing new words and phrases is also helpful. Of course, learning English takes some time, so don’t be impatient. Remember, Rome wasn’t built in a day. And then since English is not our native tongue, we must develop the muscles of your speech organs to produce unfamiliar sounds. When you read, read as loudly as possible, as clearly as possible and as quickly as possible. Tongue muscles’ training is of importance in learning any foreign language.
Third, if you want to speak good English, please don’t care how poorly well you speak, only care about catching the chances to speak. You must enjoy losing face, just forget about your face. The more you speak, the better your English will become. The more mistakes you make, the more progress you will make. You must enjoy speaking poor English, because speaking is the only thing that will lead you towards success. Don’t give up. Just try your best.
Every time you move your mouth, your memory will deepen, your muscles will strengthen. You can make it.
I have made a considerable amounts of public English speaking in my life, I am often asked why the crazy English method is better than other methods or if the crazy English method will help all English learners. My answer is, the method will help the English learners because it is a perfect match with the Chinese principles of diligence, self-help and determination. Mere exposure to English will not enable you to speak English. If you want to drive you have to get in the car and drive, if you want to dance you have to turn on the music and dance, if you want to swim you have to jump in the water and swim. In fact, swimming is the perfect comparison to learning English. You can’t learn to swim by sitting in a room and reading books about swimming skills. In order to be a swimmer you’ve got to conquer you fear, you’ve got to survive and suck in water, yell for help, you’ve got to lose face many times before you can make it. But, to be a good swimmer you’ve got to practice again and again. To be a
《2分钟英语演讲》出自：百味书屋
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