数学的力量来自于它的抽象和概括能力，将具体问题转化为普遍真理。

作家是一个热爱文字、痴迷于文字、被文字所占据的人。

The sun did not know how beautiful its light was until it was reflected off this building.

Natural selection is the only known natural process that can build functional complexity.

愤怒的时候我会去打球，把怒气发泄在球上。