The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
数学家研究纯数学不是因为它有用；他研究它是因为他喜欢它，他喜欢它是因为它美丽。
朗兰兹纲领是对我们理解数学基本本质的挑战。
我不知道五年后我会在哪里，但我会拼命努力到达那里。
一本好的图画书就像一部无声电影；它不用文字就能讲述一个故事。
The highest purpose is to have no purpose at all. This puts one in accord with nature in her manner of operation.
测量可测量的，并使不可测量的成为可测量的。
The greatest sweetener of human life is Friendship. To raise this to the highest pitch of enjoyment, is a secret which but few discover.
Parental investment is the key to understanding sex differences in mating strategies.
解释：大部分药材都以新鲜为好，但艾草却以陈年的为佳，体现了药材使用的特殊性。