The best time to plant a tree was 20 years ago; the second best time is now.
种一棵树最好的时间是20年前,第二好的时间是现在。
The unexamined life is not worth living.
A proof that P = NP would have profound implications for mathematics, cryptography, and algorithm design.
如果两方发生争执,不要争吵,让第三方来判决。
我们必须在经济增长和环境管理之间取得平衡。
To be free is not to have the power to do anything you want, but to have the power to do what is right.
The best architecture comes from the synthesis of all the forces that are acting upon it.
历史学家行走在事实与想象的钢丝上。