什么是离婚的主要原因？结婚。
出自《抱朴子·广訾》。病到很急的时候就会觉得良医是重要的了，世道动乱的时候就会觉得忠贞的臣子是重要的了。
The elegance of a mathematical proof is in its simplicity and clarity.
The spread of liberal democracy and the integration of the world economy are the two main forces driving the world towards the end of history.
Life's too short to hang out with people who aren't resourceful.
We live in an age that reads too much to be wise, and thinks too much to be beautiful.
The true discovery of America is before us. The true fulfillment of our spirit, of our people, of our mighty and immortal land is yet to come.