Do not , for one repulse , give up the purpose that you resolvedto 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.)

 Don't part with your illusions .When they are gone you may still exist , but you have ceased tolive. (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)

I want to bring out the secrets of nature and apply them for thehappiness of man . I don't know of any better service to offer forthe short time we are in the world .(Thomas Edison , Americaninventor)
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.)

Ideal is the beacon. Without ideal , there is no securedirection ; 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 .)

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

 If you doubt yourself , thenindeed 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)

 If you would go up high , thenuse your own legs ! Do not let yourselves carried aloft; do notseat 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.)

 It is at our mother's knee thatwe acquire our noblest and truest and highest , but there is seldomany money in them.( Mark Twain , American writer )
就是在我们母亲的膝上，我们获得了我们的最高尚、最真诚和最远大的理想，但是里面很少有任何金钱。(美国作家马克·吐温)

Living without an aim is like sailing without a compass. (Davyde La Pailleterie, French Writer)
生活没有目标就像航海没有指南针。 (法国作家大仲马. A.)

 The ideals which have lighted myway , and time after time have given me new courage to face lifecheerfully 19 have been kindness , beauty and truth .(AlbertEinstein , American scientist)
有些理想曾为我们引过道路，并不断给我新的勇气以欣然面对人生，那些理想就是——真、善、美。 (美国科学家 爱因斯坦 . A .)

 The important thing in life isto have a great aim , and the

determination to attain it. (Johan Wolfgang von Goethe , GermanPoet and dramatist)
人生重要的事情就是确定一个伟大的目标，并决心实现它。(德国诗人、戏剧家歌德 . J . M .)

 The man with a new idea is acrank until the idea succeeds .(Mark Twain , American writer)
具有新想法的人在其想法实现之前是个怪人。 (美国作家 马克·吐温)

 The only limit to ourrealization of tomorrow will be our doubts of today .(FranklinRoosevelt , 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 .)

 When an end is lawful andobligatory, the indispensable means to is are also lawful andobligatory .(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.)

来源:

http://www.chinaenglish.com.cn/html/2008-06/24807.html