1. The only limit to our realization of tomorrow will be our doubts of today .(Franklin Roosevelt , American president)实现明天理想的唯一障碍是今天的疑虑。 (美国总统 罗斯福. F .)

2. When an end is lawful and obligatory, the indispensable means to is are also lawful and obligatory .(Abraham Lincoln , American statesman)如果一个目的是正当而必须做的，则达到这个目的的必要手段也是正当而必须采取的。(美国政治家 林肯. A.)

3. Genius only means hard-working all one's life .( Mendeleyer , Russian Chemist) 天才只意味着终身不懈的努力。 (俄国化学家 门捷列耶夫)

4. I have nothing to offer but blood , toil tears and sweat . (Winston Churchill, British Politician) 我所能奉献的没有其它，只有热血、辛劳、眼泪与汗水。(英国政治家 丘吉尔 . W.)

5. Man errs so long as he strives. (Johan Wolfgang Goethe , German poet and dramatist) 人只要奋斗就会犯错误。 (德国诗人、剧作家 歌德. J. W.)

6. My fellow Americans , ask not what your country can do for you; ask what you can do for your country . My fellow citizens of the world ; ask not what America will do for you, but what together we can do for the freedom of man . (John Kennedy , American President )美国同胞们，不要问国家能为你们做些什么，而要问你们能为国家做些什么。全世界的公民们，不要问美国将为你们做些什么，而要问我们共同能为人类的自由做些什么。 (美国总统 肯尼迪. J.)

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7. Our destiny offers not the cup of despair , but the chalice of opportunity . (Richard Nixon, American President )命运给予我们的不是失望之酒，而是机会之杯。(美国总统 尼克松 . R.)

8. Patience is bitter, but its fruit is sweet . (Jean Jacques Rousseau , French thinker) 忍耐是痛苦的，但它的果实是甜蜜的。 (法国思想家 卢梭. J. J.)

9. Progress is the activity of today and the assurance of tomorrow . (Emerson, American thinker )进步是今天的活动、明天的保证。 (美国思想家 家默生)

10. The world can be changed by man's endeavor, and that this endeavor can lead to something new and better .No man can sever the bonds that unite him to his society simply by averting his eyes . He must ever be receptive and sensitive to the new and have sufficient courage and skill to novel facts and to deal with them . (Franklin Roosevelt , American President ) 人经过努力可以改变世界，这种努力可以使人类达到新的、更美好的境界。没有人仅凭闭目、不看社会现实就能割断自己与社会的联系。他必须敏感，随时准备接受新鲜事物;他必须有勇气与能力去面对新的事实，解决新问题。(美国总统 罗斯福建. F.)

11. There is no royal road to science ,and only those who do not dread the fatiguing climb of gaining its numinous summits . (Karl Marx, German revolutionary ) 在科学上没有平坦的大道，只有不畏劳苦沿着其崎岖之路攀登的人，才有希望达到它光辉的顶点。( 德国革命家 马克思. K .)

12. The man who has made up his mind to win will never say "impossible ". (Bonaparte Napoleon ,French emperor )凡是决心取得胜利的人是从来不说“不可能的”。( 法国皇帝 拿破仑. B.)

13. To do whatever needs to be done to preserve this last and greatest bastion of freedom .(Ronald Reagan , American President )为了保住这最后的、最伟大的自由堡垒，我们必须尽我们所能。(美国总统 里根. R.)

14. Do not , for one repulse , give up the purpose that you resolved to effect .(William Shakespeare , British dramatist)不要只因一次失败，就放弃你原来决心想达到的目的。(英国剧作家 莎士比亚.W.)

15. Don't part with your illusions . When they are gone you may still exist , but you have ceased to live. (Mark Twain , American writer)不要放弃你的幻想。当幻想没有了以后，你还可以生存，但是你虽生犹死。((美国作家 马克·吐温)

16. I want to bring out the secrets of nature and apply them for the happiness of man . I don't know of any better service to offer for the short time we are in the world .(Thomas Edison , American inventor)我想揭示大自然的秘密，用来造福人类。我认为，在我们的短暂一生中，最好的贡献莫过于此了。 (美国发明家 爱迪生. T.)

17. Ideal is the beacon. Without ideal , there is no secure direction without direction , there is no life .( Leo Tolstoy , Russian writer)理想是指路明灯。没有理想，就没有坚定的方向;没有方向，就没有生活。 (俄国作家 托尔斯泰. L .)

18. If winter comes , can spring be far behind ?( P. B. Shelley , British poet ) 冬天来了，春天还会远吗?( 英国诗人, 雪莱. P. B.)

19. If you doubt yourself , then indeed you stand on shaky11 ground .( Ibsen , Norwegian dramatist )如果你怀疑自己，那么你的立足点确实不稳固了。 (挪威剧作家 易卜生)

20. If you would go up high , then use your own legs ! Do not let yourselves carried aloft; do not seat yourselves on other people's backs and heads . (F. W . Nietzsche , German Philosopher)如果你想走到高处，就要使用自己的两条腿!不要让别人把你抬到高处;不要坐在别人的背上和头上。(德国哲学家 尼采. F. W.)