"You have to work hard to get to the top, but you have to work even harder to stay there."

The house,the stars,the desert,what givethem their beauty is something that is invisible.

国家是人类社会中最重要的机构，因为它是唯一可以合法使用武力来维持秩序的机构。

Diplomacy is the continuation of war by other means.

科学不是关于正确，而是关于减少错误。