板块是地幔对流的地表表现。

人通过被某人需要而找到生活的意义。

释义：培养自己好的品德、性情，即使细微的地方，也一定要谨慎。

A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.

最大的炫耀就是对自己的皮肤感到舒适。