The interplay between analysis and algebra is the driving force behind many breakthroughs in number theory.

The quality of an organization's dedication determines the quality of its service.

作家必须甘于不适。

Sustainable development is not an option, but a necessity for the coal sector.

I am so clever that sometimes I don’t understand a single word of what I am saying.

书桌上不能有太多的书，心中则不能少书；这就好像鱼离了水则干枯，心中没有书则无寄托。

我认为你不应该为你的热情道歉。

Never, ever give up.

The natural and moral world is the two-fold object of man's rational care.

过去总是紧张的，未来是完美的。