一个词的意义在于它在语言中的使用。

Politics has no permanent friends or enemies, only interests.

如果我们从一开始就能预见，甚至证明，遵循某种方法我们将达到我们的目标，那么这种解决方法就是完美的。

Sustainability is no longer an option; it's a necessity for the future of dairy farming.

We are what we pretend to be, so we must be careful about what we pretend to be.

进步的关键在于坚持和挑战传统观念的意愿。