The language of mathematics is universal, and it is through this language that we can communicate the most profound truths of the universe.
The past is never dead. It's not even past.
有些人即使没有存心做坏事,可事实上事情仍会做错,引起不幸的后果。凡是粗心大意、看不出别人的好心好意,而且缺乏果断的人,都一样能害人。