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) 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.)

　　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.)

　　If you doubt yourself, then indeed you stand on shaky 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) I

　　f 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.)