自动控制的根本问题是在存在干扰的情况下维持期望状态。

Education is one of the most powerful tools we have for reducing inequality and promoting social mobility.

To make love with a stranger is the best. There is nothing more exciting.

任正非在一次董事会上说

凡是创作古文，必须推究前代文章的本意，以此展现自己的学问。

Don't go chasing waterfalls

希望とは、暗闇の中の小さな光だ。