过去永远存在，现在永远是过去。

如果你热爱一件事时，你就会为它克服一切困难。

It's not just the ad, but the product that must be interesting.

A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.

让女性成为理性的生物和自由的公民，她们很快就会成为好妻子和好母亲。

我希望我的音乐能成为需要它的人的朋友。

The great and chief end, therefore, of men's uniting into commonwealths, and putting themselves under government, is the preservation of their property.

对黑洞的研究彻底改变了我们对空间和时间的理解。