经济学中最重要的是理解个人和企业的行为。

The richness I achieve comes from Nature, the source of my inspiration.

如果物体处于静止状态或作匀速直线运动，只要没有外力作用，物体将保持静止状态或匀速直线运动状态。

It is remarkable that a science which began with the consideration of games of chance should have become the most important object of human knowledge.

政府下的人的自由是拥有一个普遍适用的常规生活准则，而不受另一个人的多变、不确定和武断意愿的支配。

I'm focused on what I can control. I can't control what people say about me.

Never underestimate the power of collaboration.

小于给定数的素数个数是该数的一个函数。