Write a program as carefully as you write a letter.

"Time is a river that carries us away, but it also leaves behind traces of our existence, like footprints in the sand."

The beauty of mathematics lies in its ability to reveal hidden symmetries and truths.

行动即性格。

The speech we hear is an indication of that which we don't hear.

全球粮食安全始于当地的土壤安全。