神经系统是一个动态的、不断变化的系统。

世事犹如书籍，一页页被翻过去。人要向前看，少翻历史旧账。

Anything you say before the word “but” does not count.

Before I came here I was confused about this subject. Having listened to your lecture I am still confused. But on a higher level.

Perhaps you are overvaluing what you don’t have and undervaluing what you do.

The beauty of physics lies in its ability to explain the complex with simple laws.

孔子说：“《关雎》这篇诗，快乐却不淫秽，悲哀却不伤痛。”