过去是一个无处不在的阴影。
The past is a shadow that follows us everywhere.
及时采拮你的花蕾，旧时光一去不回。今天尚在微笑的花朵，明日便在风中枯萎。
You're dead if you aim only for kids. Adults are only kids grown up， anyway.
Theorems are the permanent literature of mathematics.
互联网是一个创新的平台，但它也需要负责任的使用。
Teamwork is the foundation of success—no great achievement is accomplished alone.
沙漠不能被声称或拥有——它是一块由风携带的布，从未被石头固定，被赋予了一百个变化的名字。