字符串是一个严格的数据结构，在传递字符串的任何地方都存在很多重复的过程。它是隐藏信息的理想工具。

Love takes up where knowledge leaves off.

You have to believe in yourself when no one else does.

We must balance economic growth with environmental responsibility.

The joy of mathematics comes from the moments of clarity when complex things become simple.

The sole meaning of life is to serve humanity.

生活中最重要的不是征服，而是要战斗得好。