If you can't explain your chemistry to a non-scientist, you don't understand it well enough.

承认规则是法律体系中的终极规则，它确定了有效法律的标准。

You don't build a business. You build people, and then people build the business.

数学不知道种族或地理界限；对于数学来说，文化世界是一个国家。