Our frustration is greater when we have much and want more than when we have nothing and want some. We are less dissatisfied when we lack many things than when we seem to lack but one thing.

We must listen to the science and act decisively to preserve marine biodiversity.

The individual has always had to struggle to keep from being overwhelmed by the tribe.

物理学的美丽在于它能够用简单的原理描述复杂的事物。

The best way to learn mathematics is to do mathematics.