外交的目标是建立稳定的国际关系，以促进全球和平、繁荣和可持续发展。

购买旧书，它们的词与新词相同，也可以去图书馆。

The rat in the maze is not just learning a series of turns, but is building up a cognitive map of the whole situation.

Sometimes the simplest solutions in chemistry are the most elegant and powerful.

经济学的艺术在于理解规则与行为之间的微妙互动。

Success is doing what you want to do, when you want, where you want, with whom you want, as much as you want.

It is not enough to conquer； one must learn to seduce.