No medicine cures what happiness cannot.

The passion for office among members of Congress is very great, if not absolutely disreputable.

领导力就是今天做出艰难的决定，以塑造更美好的明天。

The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.

我在这里是为了给世界带来欢乐，并帮助全世界的儿童。