Capitalism, then, is by nature a form or method of economic change and not only never is but never can be stationary.

文章的精妙之处，如同造物主赋予万物，各自肖似其形，各自极尽其态。

在原子世界中，数学语言是唯一可以使用的语言。

The best characters are the ones who stay with you long after the book is closed.

证明的目的是理解，而不仅仅是验证。