The rules of art are not arbitrary; they are founded in reason and in the nature of things.

最优货币区是指能够以最小的实际经济干扰来稳定就业和价格的区域。

我不是时间，我是空间。

I’m not afraid to take risks. I think that’s what life is all about.

The Internet is a platform for innovation, but it also requires responsible use.

在量子力学中，观察者与被观察的系统并不是分离的。

在快速变化的市场中，灵活性和适应性是企业成功的关键。