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

Man is so much the voice of his interest that it is not enough to make him see the right， but you must make him feel it.

I’m a normal guy who just happens to play tennis very well.

据说人无完人。又据说磨练出完美。你们对下词好吗?

我的祖国是葡萄牙语。