The search for reciprocity laws is a fundamental theme in the history of mathematics.

We not only want to make cars, but also make good cars.

天下的根本在于国家，国家的根本在于家庭，家庭的根本在于个人。

写作是唯一一件当我做的时候，我不会觉得我应该在做其他事情的事情。

We must think beyond carbon credits—real impact comes from holistic land management.