自然万物发展变化的规律是：发展到尽头，就会走向反面；发展到极盛之后，就会趋于衰落。

There is something profoundly mysterious about quantum mechanics that we still don't understand.

地球是一个动态的行星，其内部热量是地质变化的驱动力。

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.