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The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.
I’m a very positive thinker, and I think that is what helps me the most in difficult moments.
荒野是一个发现的地方。要生存,你必须探索它。
教人学习却坚持有天命的观点,这就好像叫人包起头发来却有去掉了他的帽子。 
这世界上聪明的人,努力的人太多了,要得到你想要的东西,最可靠的办法,是让自己配得上它。