All things are possible until they are proved impossible and even the impossible may only be so, as of now.
真相并不总是美丽的,美丽的话语也不一定是真相。
即便你是富贵之人或王侯将相,最终也会像荒草一样被埋葬在岁月中。
在数学中,最简单的问题往往导致最深刻的发现。