I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.

健康的国民是一个国家能拥有的最大财富。

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.

技术本身没有价值，技术的价值在于它解决了什么问题。

The art of the past is being mystified because a privileged minority is striving to invent a history which can retrospectively justify the role of the ruling classes.