质量不是一种行为，而是一种习惯。

模形式的算术是理解高维对象的门户。

Sustainable fishing isn't an option—it's the only path forward if we want our oceans to thrive.

The only way to have a friend is to be one.

善于教导的人必须遇到善于学习的人，才能使教育的效果更大。