Stray birds of summer come to my window to sing and fly away. And yellow leaves of autumn, which have no songs,flutter and fall there with a sigh.

译文：敬重他人，就是尊重自己；依靠自己，胜过依赖他人。赏析：爱人者，人恒爱之，敬人者，人恒敬之。要想得到别人的尊重，我们首先学会尊重别人。靠人不如靠己，求人不如求己。与其把希望寄托于他人，不如自己脚踏实地，努力拼搏。

Learning consists in the modification of certain mediating processes which operate between the stimulus and the response.

对黑洞的研究彻底改变了我们对空间和时间的理解。

追求真理是人类最高尚的事业。

"We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough to have a chance of being correct."