The Milky Way’s black hole is our closest laboratory for studying extreme gravity.

我不是一个喜欢回头看的人。我总是向前看。

Diplomacy is the art of restraining power.

The greatest discovery of my generation is that a human being can alter his life by altering his attitudes.

我们的目标是让消费者以最低的价格买到最好的商品。