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。

收敛精神，自己做主。

A well-designed space can change how people feel and interact with their environment.

There are some natures too noble to curb and too lofty to bend.

The more you know about yourself, the more patience you have for what you see in others.

大脑是一个并行处理器，能够同时处理多个信息流。