单子是不可分割的实体，是构成世界的基本元素。

如果你相信自己能做到，我认为没有什么是不现实的。

I'm very proud to be black, but black is not all I am. That's my cultural historical background, my genetic makeup, but it's not all of who I am nor is it the basis from which I answer every question.

我们要以客户为中心，不断提升产品和服务质量。