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.) 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)

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　　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.)

　　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 .)