唯一确定的是不确定性。
The only certainty is uncertainty.
The process of grouping, of organization, is not arbitrary but follows definite laws.
"A good book is a magic gateway to a world of imagination."
The true artist is always searching for the meaning of life.
The future belongs to those who understand that doing more with less is compassionate, prosperous, and enduring.
当随机化不可行时，匹配方法可以是一个强大的工具。
If you have no enemies, you're dead.