我们今天种植的每一棵树都是为我们永远不会见到的后代留下的遗产。

英国人不太注重精神生活，所以他们发明了板球来让他们对永恒有点概念。

"The world is a book, and those who do not travel read only one page."

法国是欧洲的灵魂。

The security dilemma is a fundamental feature of international politics, as states' efforts to increase their own security often decrease the security of others.