There is nothing either good or bad, but thinking makes it so.

解释：大多数花类药材都有升散的作用，而旋覆花却有降气的作用，说明药材特性的多样性。

投资清洁能源技术不仅对环境有益；对企业也有利。

Living is like tearing through a museum. Not until later do you really start absorbing what you saw, thinking about it, looking it up in a book, and remembering - because you can’t take it in all at once.

当随机化不可行时，匹配方法可以是一个强大的工具。

我不是说唱歌手，我是一个改变世界的人。