The most exciting discoveries often come from looking at old problems in completely new ways.

小说是一面走在路上的镜子。

I don't let the past define my future.

The past is a foreign country; they do things differently there.

人们永远不会注意到已经做了什么；人们只能看到还有待完成的事情。

化学的基本问题是化学键的性质。