真正的作家没有传记，他的传记就是他的书。
The only way to learn mathematics is to do mathematics.
México es un país de espejos rotos, donde cada fragmento refleja una realidad distinta.
预测未来的最好方法就是创造未来。
States are rational actors that seek to maximize their relative power in order to ensure their survival in a competitive international system.
Coal mining is a partnership between the earth and human ingenuity.
Intelligence is not to make no mistakes,But quickly to see how to make them good.
