可归约性的概念对于理解不同计算问题之间的关系至关重要。

There is no such thing as a moral or an immoral book. Books are well written, or badly written. That is all.

The rocks may be hard, but our resolve must be harder.

I don’t need a reason to be successful.

最好的投资是投资于那些正在建设未来的人。