A person may cause evil to others not only by his actions but by his inaction, and in either case, he is justly accountable to them for the injury.
爱情就像沙漏:当心空了,头脑就开始填满。
我不怕别人说我不好,我怕的是自己不够好。
做数学就是参与发现与猜想、直觉与灵感的过程。