经典英语演讲稿14篇
演讲稿是一种实用性比较强的文稿，是为演讲准备的书面材料。在生活中，演讲稿使用的情况越来越多，写起演讲稿来就毫无头绪？以下是小编整理的经典英语演讲稿，供大家参考借鉴，希望可以帮助到有需要的朋友。
经典英语演讲稿1
高中英语学科的高手历来都具备以下四大特征：
一、词汇量比一般学生大，语言知识（习惯用法）积累够多。
二、语法基础过硬，并且在阅读能中敏锐地发现语法知识和语言知识。
三、听说能力很强。
四、善于捕捉机会用英语表达自己，有良好的英语思维习惯。
英语是一门工具学科，其重点不在于要从老师那里学到多少有关英语的知识，而在于在老师的指导和帮助下，练就一套扎实过硬的听说读写能力和探究英语语言规律的能力。作为刚跨进高中大门的一年级的新生，不宜仅停留和满足于初中英语学习中所形成的一些学习方式。过去的学习方式需要发展、改进和完善。英语学习是在一系列活动中完成的。这些活动应该组成一个完整的系统。在构建自己的英语学习系统中，一定要从听、说、读和写四大技能方面考虑。
能听懂他人比较纯正的英语，不仅是英语考试的需要，也是同学们未来步入社会，施展才能所必需的技能。我们平时的听力训练不仅仅是在训练你的英语听力，其实它也是一种语感培养，充足的英语听力训练同时也会极大的有助于提高学习者的口语能力。鉴于同学们不可能自己抽出多少时间去听英语歌曲、看英文电影或者直接用英语与人口头交流，那么，充分利用好本年级统一的听力训练时间就显得尤其重要。在听力训练中，既要学会抓关键词，也要学会听懂完整的句子；既要学会听懂不同语音语调对语意的影响，也要学会听懂有失去爆破和连读现象的句子。有难度的听力训练试题最好是能在过了一段时间后，等到忘记得差不多时，有再听一次的机会。所以在做听力训练试题时，我建议同学们一律用铅笔做记号，对完答案、看完录音文字材料后再把铅笔痕迹察掉。
英语的口头表达能力虽然不是我们考试的必备能力，但它却是同学们将来所需要的最重要的，最实用的英语技能。一口流利的英语是每一个英语学习者所梦想达到的理想水平。重视口语能力的训练不仅对未来有重要意义，对提高同学们高中阶段的英语水平也有非常重要的意义。说英语就是运用英语。语言能力和语言知识，同许多其它能力和知识一样，只有通过运用，并且经常运用才会真正地学到手，学到家。英语是一门语言。语言是听出来的，是经过不断模仿后才能说出来的。高中生的英语口语能力要求，除了一般日常交际应答以外，还应该具备能连续表达含五个以上的句子。练就一口流畅的英语口语需要同学们抓住三个机会：一是课堂上老师为同学们提供的开口机会。二是课前演讲或者值日报告的机会。三是早读是个好机会。早读不应该总是停留在背单词、背课文这样的简单劳动中。单词不是用来背诵的。朗读单词的目的是要把单词的发音读准，并且能上口，读起来不勉强，不绕口。课文也不是用来背诵的。熟读课文是为了加深理解，巩固词汇知识和语法知识。既然口语能力那么重要，同学们不妨把背诵或者复述课文当成是口语表达或者演讲的准备呢？换句话说，把课文材料准备得再熟悉不过以后，来一次演讲展示，那且不美哉！真正的高英语水平绝不是看书看出来的，也不是做习题能做出来的，更不是听老师讲课能听出来的。早读期间通过不断模仿，放声吼叫，反复实践，你一定能快速提高自己的口语表达能力。
英语短文阅读的重要性不仅表现在高中英语考试中它的份量最大，而且还表现在英语短文是英语词汇知识和语法知识的载体方面。词汇量的扩大、词汇知识的丰富和句子表达的多样性光靠死记硬背是无法也不可能实现的。扩大词汇量、丰富自己的词汇知识和地道完美的表达自己只有依靠优良的阅读习惯。教材课文是精读材料，需要同学们读熟读透，直至能开口娓娓道来为止。课外阅读又叫泛读。高中英语新课标教材对高中前八个模块的学习有一个要求：课外阅读要完成30万单词的阅读量。也就是说：同学们需要每天有500到700个单词量的阅读。课外阅读也是运用语言的一种必不可少的'形式。课外阅读不能停留在完成几道阅读理解试题或者完形填空试题。关键在尽量弄懂文章中的每一句话含义、长难句的结构。留意你还不很熟悉的词汇、词汇知识和语法知识。还要去认真体会不同的英语句子在表达上的精确性。千万不要在一些你还不认识的，拼写怪诞，发音困难的生僻词汇上浪费时间和精力。
阅读能力，除词汇量大小以外，还包含阅读速度、长难句理解、和把握主题大意的能力。要会快速阅读，同学们必须学会一些阅读的技能：如：skimming(跳读)、scanning(扫读)和digesting(研读)。Skimming和scanning就是根据阅读任务在文中查找相关信息。Digesting主要是用来理解长难句、把握主题大意和作者意图以及猜测词义的技术。不仅要研读长难句结构，也还需要研读逻辑关系。
流畅的短文表达能力在很大程度上依赖于你的词汇量、词汇知识和句法知识。它们的积累在于平时的听、说和读的活动。写作表达能力中，你的英语句式的结构思维能力或者英语习惯思维能力会对表达能力有重要影响。这就需要同学们平时养成一个良好习惯：那就是总是试图用英语来表达出你眼睛所看到的，耳朵能听到的，身体能感受到的和你思想能想到的。除此之外，一篇优秀的短文还少不了三个要素：即结构，内容和语言。
一片结构完美的英文短文，尤其是说明文和议论文，往往有一个比较完优美的，诱人深入阅读的开头语。主题句是可从开头语中自然而然过度而来。你所程述的观点，一般都要用事实做论证，或者用具体方式方法来支持。巧妙的结论句往往能使文章锦上添花。
内容需要真实，合乎情理，能让人信服。文中不要有与主题无关的内容。
语言要尽可能是地道的，去汉语化的英语。要经常套用自己在阅读中、在课堂上学来句子结构去表达自己。要敢于尝试用比较复杂的句子结构和比较高级的词汇来使文章进一步美化。
听所读写四大技能并不是各自孤立的，也是相互作用和相互制约的。如果平时，只注重某一项技能的学习和训练，那是不可能成为一位真正的英语强手的。
任何一门学科都需要踏实的学习作风。外语也不例外。学外语的实主要表现在以下几个方面：
一、落实词汇、词汇知识和特殊句式的积累。落实词汇和词汇知识并不是反复背记词汇表中的单词。落实词汇、词汇知识以及特殊句式的最好办法是先探究后运用。一个词汇在经过七到八次在不同时间和不同的语境中运用后，它就是你的了。词汇知识和特殊句式也是一样。写作是运用，造句是运用，阅读，倾听和与他人用英语交流也是运用。借助词典进行造句练习，在造句中运用新学的词汇不失为一种行之有效的简单易行的方式。
二、落实课外阅读。每天坚持花半小时阅读一两篇短文。一要真正读懂。二要留意词汇运用。
三、落实早自习精读。每次有硬指标，死任务。
四、落实课内课外书面作业。简单的完成老师布置的作业量并不是落实。书面作业质的落实必须是在真正懂了、记住了的基础上又快又好的独立的、闭卷式的完成书面作业。对发现的漏洞和缺陷要采取补救措施。
五、落实自主探究的学习能力培养。学习中缺乏自主探究，不善于利用团队合作和与老师沟通是很多高中生在学习中存在的一种普遍想象。老师不是保姆，老师不可能把英语的词汇知识和英语的四大能力烹制成一道道佳肴后，一口一口地喂进学生的口中。老师的探究代替不了学生的探究。学习能力的培养主要是探究能力的培养。学会了探究，你才会在知识的大海中畅游。学会了探究，你才会成为终身学习者。英语学科的探究应该表现在对某一特定词汇在文中、在句中的用法和含义的探究，对长难句结构和含义的探究，对相关知识关联的探究，对作者意图、主题大意的探究，当然也包含对学法的探究。要探究知识，要有工具（词典以及各种手册等）的帮助，更要有团队的合作，还要有老师的帮助。团队合作可以让你取他人之长补自己之短，还可以集思广益，产生思想火花。常与老师沟通是可以使你更容易发现前进的方向，少走弯路。
总而言之，英语学习需要同学们从听说读写四大技能方面养成良好的学习习惯，坚持语言知识积累、精读、泛读、课内课外作业和自主探究五个方面的脚踏实地地勤奋努力，就能够比较轻松地完成高中英语的学习，为自己将来的远大理想奠定坚实的外语基础。
经典英语演讲稿2
What life is about
As we all know, the most important thing in life is our attitude towards it, tons of men have tried different ways of treating life, and some succeeded, some failed, and here are some of the tips they left us.
Life isn’t about keeping score. Life isn’t about your shoes or your hair or the color of your skin. In fact it’s not about if you have lots of friends or if you are alone, and it’s not about how accepted or unaccepted you are. Life just isn’t about that.
But life is about whom you love and who you hurt. It’s about how you feel about yourself. It’s about trust, happiness and compassion. It’s about sticking up for your friends and replacing inner hate with love. Life is about avoiding jealousy, overcoming ignorance and building confidence. It’s about what you say and what you mean. It’s about seeing people for who they are and not what they have. And we should always remember to be ourselves. Other might have things that we desire but being what we really are is the only trail leading to the true colors of life. Most of all, it’s about choosing to use your life to touch someone else’s in a way that could have never been achieved otherwise.
The paradox of our time in history is that we have taller buildings but shorter tempers; we buy more but enjoy them less. We’ve learnt how to make a living but not a life, we’ve added years to life, but not life to years. And it is time for us to choose whether to make a difference in our life.
And these choices are what life is about.
经典英语演讲稿3
亲爱的老师和同学们：
我很高兴在这里说点什么。这时，我想谈谈我的`爱好。
我有很多爱好。首先，我喜欢玩电子游戏。电脑游戏很酷。我可以玩一整天。第二，我喜欢各种运动。我喜欢新鲜空气和阳光。和朋友踢足球很有趣。
在海里游泳是我最喜欢的。我也喜欢在家画画。此外，我喜欢音乐。我喜欢唱歌。我经常在街上散步时唱电影歌曲。当然，我每天都学英语。如你所知，英语在世界各地都被使用。所以我学英语很努力。我希望有一天我能环游世界，和外国人说英语。
还有更多我喜欢做的。还有我想说的。也许下次我可以告诉你更多。谢谢大家的倾听。
经典英语演讲稿4
We've all been taught that we should help people. It is the right thing to do and will make us popular with others. It may even win us favors in return. However, we must be realistic. We can't say yes to every request. If we did, we would fail or go crazy for sure. Sometimes we simply don't have the time to help. In this case, we must know how to say no politely.
When we need to say no, here is one method we can try. First, we should tell the truth. If we really can't do something, we should just say so. Second, we should remember to refuse requests politely. We must communicate clearly, but must also be sincere and sympathetic. A true friend will understand. Finally, we must not feel guilty about saying no. Sometimes refusing others is the right thing to do. It can save ourselves, and them, a lot of trouble. In short, we cannot please everyone all the time. Refusing favors is a part of life.
经典英语演讲稿5
Knowledge collaboration and all-round education
Ladies and gentlemen,
We engineering students take it for granted that technology is changing incredibly fast. We are thinking nervously and seriously whether our colleges are failing to provide a foundation in the skills currently needed in industry. Take my major telecommunications for example. Scientists say that 21st century is a biomedical time, not an electrical time. But without the help of electronic data processing and transformation, biomedical technology alone cannot go too far. Funny enough, the word biomedical itself is just a combination of two disciplines. So the interdisciplinary exploitation serves as the critical part for our electric and electronics world as well as any other fields to find new way of being.
But the power of knowledge collaboration is certainly not restricted to science and engineering; it is in the full community of learning. Walking around campus I absorbed a reality that there is a seamless web between students from different professional backgrounds. The engineering students are discussing animatedly in a philosophy lecture, speaking passionately in the public speaking club, and looking for sparkling ideas from learning history and arts. How wonderful that is! That, ladies and gentleman, is just a significant step forward to be well-rounded because once we jump out of the circle we can see the bigger picture.
My friends, I hope that you have already got what university is all about. Please let me end my speech with the Nobel Prize winner Li Zhengdao’s words: “The realization of the perfect combination of science and engineering, science and arts, technology and humanity，is the greatest symbol of a university’s success.” Thank you.
经典英语演讲稿6
Most people would like to be popular with others, but not everyone can achieve this goal. What is the secret to popularity? In fact, it is very simple. The first step is to improve our appearance. We should always make sure that we stay in good shape and dress well. When we are healthy and well-groomed, we will not only look better but also feel better. In addition, we should smile and appear friendly. After all, our facial expression is an important part of our appearance. If we can do this, people will be attracted to our good looks and impressed by our confidence.
Another important step is developing more consideration for others. We should always put others first and place their interests before our own. It's also important to be good listeners; in this way people will feel comfortable enough to confide in us. However, no matter what we do, we must not gossip. Above all, we must remember to be ourselves, not phonies. Only by being sincere and respectful of others can we earn their respect. If we can do all of the above, I am sure popularity will come our way.
经典英语演讲稿7
大家好，我今天演讲的题目是“我的梦想”。
每个人都有梦想，而且很好，我也不例外。我有一个小小的梦想，当我达到目标时，我会实现更多的梦想。开始，我还是个婴儿，一心想变得很强壮，像少林寺里的孩子一样，武功高强。但是我觉得离开父母去很远的地方练武，辛苦，有点舍不得。小时候，我有一个梦想，我希望我有钱。大人问：小姑娘，有了钱你打算怎么办？我要去买泡泡糖"如果你有很多钱？
我打算买很多泡泡糖。"如果你有钱花的话？我会买泡泡糖工厂。"天真的童年我们的确有一颗善良的心，幸福和快乐是同一首曲子。
慢慢进入小学，课程越来越深，知识越来越多。会感受到压力。现在我有一个梦想。我希望我没有；我每天没有很多作业要做。玩的有点剥夺，而我们40%的日子都禁锢在教室里，很多时间都在学习。但是在学习面前，是一种模糊的知识。俗话说，一种罕见的困惑。对事物的理解，从封建主义到资本主义，越大越觉得自己的观点是正确的。每天放学回家后忙了一天一夜的课，他又困又累，吃不到深夜吃的食物。这样的.生活很单调，可能有时候会想念我的很多小学同学，有时候会带着一节课或者一副朦胧的睡相。讨厌死板的校服，我从来不到处穿。周六，周日；时间很短，孩子很想磨炼，慢慢了解生活；太难了，努力吧，梦想好了，我会努力让每个人都生活起来，早起晚睡，把握住自己，不再松懈。我也想为他们的梦想而奋斗。
我的演讲结束了，谢谢！
经典英语演讲稿8
I have a wonderful dream in my heart。 It's to speak English very well。Since English is everything for me。 English is my best friend.English is mysoul。 English is my power。 Without English，I'm nothing at all。 Nothing。 Now，Ican think in English，speak in English，and write in English. Some people thinkI'm an Indian。 Some people regard I'm a Pakistan. And some people even considerthat I'm an Egyptian. But if I could speak English as good as an American，myfuture would be brilliant. So I work very hard.
经典英语演讲稿9
尊敬的各位领导、老师：
大家下午好！我叫xx，原来在xx小学工作，近几年来一直从事小学英语的教学，今年因工作调动，调整到我们xx小学工作，我感到非常的高兴，同时，也非常感谢我们学校领导能给我这样一次展示自我、成就自我的机会。我今天我竞聘的岗位是三、四年级的英语教学。
首先我说一下自己的基本情况和工作业绩：我xx年毕业于xx师专数学系，后分配到xx中学从事数学教学，xx年开始改教初中英语，xx年因身体状况，调入小学从事小学英语教学至今，xx年自考大学本科毕业，xx年被评为中学一级教师。
自工作以来，我一直兢兢业业，勤奋工作，所教科目成绩一直据全镇前列，特别是近几年来从事小学英语教学，所教班级多次获得全镇第一名，个人也多次被评为镇教育先进工作者、优秀教师，区优秀教师，个人年考核优秀等次的荣誉称号，并有多篇论文在市级报纸发表。
下面我谈一下，我竞聘英语教师的几个优势和条件：
1。有良好的师德
我为人处事的原则是：老老实实做人，认认真真工作，开开心心生活。自己一贯注重个人品德素质的培养，努力做到尊重领导，团结同志，工作负责，办事公道，不计较个人得失，对工作对同志有公心，爱心，平常心和宽容心。自从参加工作以来，我首先在师德上严格要求自己，要做一个合格的人民教师！认真学习和领会上级教育主管部门的文件精神，与时俱进，爱岗敬业，为人师表，热爱学生，尊重学生，争取让每个学生都能享受到最好的教育，都能有不同程度的发
2。有较高的专业水平
我从xx师专数学系毕业后曾到xx师范大学进修英语教学培训，系统而又牢固地掌握了英语教学的`专业知识。多年来始终在教学第一线致力于小学英语教学及研究，使自己的专业知识得到进一步充实、更新和扩展。
3。有较强的教学能力
从选择教师这门职业的第一天起，我最大的心愿就是做一名受学生欢迎的好老师，为了这个心愿，我一直在不懈努力着。要求自己做到牢固掌握本学科的基本理论知识。
熟悉相关学科的文化知识，不断更新知识结构，精通业务，精心施教，把握好教学的难点重点，认真探索教学规律，钻研教学艺术，努力形成自己的教学特色。我的教学风格和教学效果普遍受到学生的认可和欢迎。
以上所述情况，是我竞聘英语教师的优势条件，假如我有幸竞聘上岗，这些优势条件将有助于我更好的开展英语教学工作。
如果我有幸竞聘成功，能担任三四年级英语教师的话，我将从以下方面开展工作。
一是认真贯彻执行党的教育路线、方针、政策和学校的各项决定，加强学习，积极进取，求真务实，开拓创新，不断提高自己的综合素质、创新能力，用自己的勤奋加智慧，完成好教学任务。使我校的英语教学上一个大的台阶。
二是做一个科研型的教师。教师的从教之日，正是重新学习之时。新时代要求教师具备的不只是操作技巧，还要有直面新情况、分析新问题、解决新矛盾的本领。进行目标明确、有针对性解决我校的英语教学难题。
做一个理念新的教师
目前，新一轮的基础教育改革早已在我市全面推开，作为新课改的实践者，要在认真学习新课程理念的基础上，结合自己所教的学科，积极探索有效的教学方法。大力改革教学，积极探索实施创新教学模式。把英语知识与学生的生活相结合，为学生创设一个富有生活气息的真实的学习情境，同时注重学生的探究发现，引导学生在学习中学会合作交流，提高学习能力。
做一个富有爱心的老师
“不爱学生就教不好学生”，“爱学生就要爱每一个学生”。作为一名教师，要无私地奉献爱，处处播洒爱，使我的学生在爱的激励下，增强自信，勇于创新，不断进取，成长为撑起祖国一片蓝天的栋梁。用质朴的心爱护学生，用诚挚的情感染学生，用精湛的教学艺术熏陶学生，用忘我的工作态度影响学生。
尊敬的各位领导，各位老师，我会珍惜现有的每一个机会，努力工作，发挥出自己的最大能力，以高尚的情操、饱满的热情上好自己的英语课程，享受我的教学乐趣！
最后我想说：做教师，我无悔！做英语教师，我快乐！
经典英语演讲稿10
Winter was gone,spring comes.I love spring best,because it's verybeautiful.In spring,the weather is aways sunny and rainy,it's not cold and nothot,it's warmer and warmer.The flowers begin to open and the trees begin to turngreen.The birds are singing in the sky,they are happy.The animals will go out toplay.Many people like to go out and enjoy the sunshine.I like wearing my sweaterand jeans, I like to fly kites,plant trees and see the beautiful flowers. Springis colorful,I think it's a wonderful season. What's your favourite season?Pleasetell me.
经典英语演讲稿11
Youth is not a time of life, it is a state of mind ; it is not rosy cheeks , red lips and supple knees, it is a matter of the emotions : it is the freshness ; it is the freshness of the deep springs of life .Youth means a temperamental predominance of courage over timidity of the appetite , for adventure over the love of ease. This often existsin a man of 60 more than a boy of 20 . Nobody grows old merely by a number of years . We grow old by deserting our ideals.
Years wrinkle the skin , but to give up enthusiasm wrinkles the soul .Worry , fear , self –distrust bows the heart and turns the spirit back to dust .
Whether 60 of 16 , there is in every human being ‘s heart the lure of wonders, the unfailing childlike appetite of what’s next and the joy of the game of living . In the center of your heart and my heart there’s a wireless station : so long as it receives messages of beauty , hope ,cheer, courage and power from men and from the infinite, so long as you are young .
When the aerials are down , and your spirit is covered with snows of cynicism and the ice of pessimism, then you are grown old ,even at 20 , but as long as your aerials are up ,to catch waves of optimism , there is hope you may die young at 80.
Thank you!
经典英语演讲稿12
尊敬的评委，同学们:
下午好！
最近，在我们的社会中有一场激烈的辩论。大学生是一种罕见特权的受益者，他们在特殊的地方接受特殊的教育。但是，我们能够面对挑战，战胜一切困难吗？我们能够改善他人的生活吗？我们能接受建设国家未来的责任吗？
愤世嫉俗者说，大学生是娇生惯养的失落的一代，他们会对最轻微的'不适感到畏缩。但是愤世嫉俗者错了。我看到的大学生都在急切地学习如何独立生活。我们互相帮忙打扫宿舍，一起逛街砍价，兼职补充零花钱。
愤世嫉俗者说我们只关心成绩；我们忽视了性格培养的需要。但愤世嫉俗者又错了。我们彼此深切关怀，我们珍惜自由，我们珍惜正义，我们追求真理。上周，我的数千名同学进行了血型测试，以便为患有血癌的儿童做出贡献。
作为大学生，我们是处在人生关键转折点的青少年。我们都面临着一个根本性的选择:犬儒主义还是信仰，每一个都将深刻地影响我们的未来，甚至我们国家的未来。我相信我所有的同学。虽然我们仍然没有经验，甚至有点幼稚。我相信我们有勇气和信念去迎接任何挑战，承担我们的责任。我们正准备承担新的责任和任务，并利用我们接受的教育使我们的世界变得更美好。我相信我们的未来。
经典英语演讲稿13
every one of us, rich or poor, should at least have one or two good friends. my friends will listen to me when i want to speak, will wipe my eyes when i cry, will take care of me when i am sick, and my friends will go together with me side by side through this journey of life.
as students, we could share more time with our friends. the friendship in our young hearts is pure, fresh and simple. i often feel very lucky to have a lot of good friends. especially when i had justin as one of my best friends. justin was my english teacher from the usa. i met him in 1996 when i was a student who could only speak very little english. justin was a vivid young man with a bright smile on his face, and he always had his special way to make the class active and attractive. he taught us english by telling stories, playing games, singing songs, and even dancing. i could still remember very clearly that one afternoon when we fin-ished our class, we went to some other classes to sing songs for them, just like what people do in the states on christmas eve. it was so interesting and unforgettable. justin was an excellent teacher, because he taught us not only how to study english well, but also the way to find out the beauty of the world and the way to be angels to others' lives. i know there was friendship and pure love in our hearts. facing this valuable emotion neither nationality nor age was important, the real importance lay in faith, under-standing, and care. justin is the best friend i have ever had, and i know i will cherish those days of staying together with him as the best part of my memory.
friendship is a kind of treasure in our lives. it is actually like a bottle of wine, the longer it is kept, the sweeter it will be. it is also like a cup of tea. when we are thirsty, it will be our best choice, but when we have enough time to enjoy ourselves, it is also the most fragrant drink.
however, in this fast-developing modern society, the reality is not that. more and more people forget to enjoy the beauty of life and -the beauty of friendship. they work hard in order to gain a higher position, in the society and to earn more money for their work. of course, we don't deny that it is important to find a bet-ter place in our lives, but we wish more and more people could pay a little more attention to themselves and their friends. all of us have to spare some time for personal lives. we have to find the chance to express our emotion and love. when staying with our friends, we can release ourselves completely. we can do whatever we want, we can laugh together, talk together, and even cry to-gether. i should say that being together with our best friends is the most wonderful moment of our lives.
as we know, we would feel lonely if we didn't even have a friend. but it doesn't mean we could depend on our friends all the time. there is a famous motto saying that “a friend is like a quilt with cotton wadding, but the real thing that keeps you warm is your own temperature.” it is really true. we have to work hard together with our friends, encourage each other and help each other. when we receive love and friendship, we should repay as much as we can.
finally, let's pray together now that one day, all of us could find the person we want to find, and could enjoy a real beautiful friendship in our lives. let's pray the flower of friendship be-tween our friends and us would always bloom brightly in our hearts.
经典英语演讲稿14
i have the answer to a question that we've all asked. the question is, why is it that the letter x represents the unknown? now i know we learned that in math class, but now it's everywhere in the culture -- the x prize, the x-files, project x, tedx. where'd that come from?
about six years ago i decided that i would learn arabic, which turns out to be a supremely logical language. to write a word or a phrase or a sentence in arabic is like crafting an equation, because every part is extremely precise and carries a lot of information. that's one of the reasons so much of what we've come to think of as western science and mathematics and engineering was really worked out in the first few centuries of the common era by the persians and the arabs and the turks.
this includes the little system in arabic called al-jebra. and al-jebr roughly translates to “the system for reconciling disparate parts.“ al-jebr finally came into english as algebra. one example among many.
the arabic texts containing this mathematical wisdom finally made their way to europe -- which is to say spain -- in the 11th and 12th centuries. and when they arrived there was tremendous interest in translating this wisdom into a european language.
but there were problems. one problem is there are some sounds in arabic that just don't make it through a european voice box without lots of practice. trust me on that one. also, those very sounds tend not to be represented by the characters that are available in european languages.
here's one of the culprits. this is the letter sheen, and it makes the sound we think of as sh -- “sh.“ it's also the very first letter of the word shalan, which means “something“ just like the the english word “something“ -- some undefined, unknown thing.
now in arabic, we can make this definite by adding the definite article “al.“ so this is al-shalan -- the unknown thing. and this is a word that appears throughout early mathematics, such as this 10th century derivation of proofs.
the problem for the medieval spanish scholars who were tasked with translating this material is that the letter sheen and the word shalan can't be rendered into spanish because spanish doesn't have that sh, that “sh“ sound. so by convention, they created a rule in which they borrowed the ck sound, “ck“ sound, from the classical greek in the form of the letter kai.
later when this material was translated into a common european language, which is to say latin, they simply replaced the greek kai with the latin x. and once that happened, once this material was in latin, it formed the basis for mathematics textbooks for almost 600 years.
but now we have the answer to our question. why is it that x is the unknown? x is the unknown because you can't say “sh“ in spanish. (laughter) and i thought that was worth sharing.
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