数学不知道种族或地理边界;对于数学来说,文化世界是一个国家。
Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.
The dead are not absent. They are just invisible.
能源转型是我们一生中最大的机遇,我们必须以勇气和务实的态度拥抱它。
只有不断学习,才能不断进步。