Sustainability isn't an option; it's a responsibility we all share.

我不是刻意要表现得性感或怎样，我只是在做我自己。

States are rational actors that seek to maximize their relative power in order to ensure their survival in a competitive international system.

El poeta es un vidente, un profeta, un mago.

数学证明的优雅类似于精心设计的算法的美丽。

你看得越多，看到的就越多。