One can't proceed from the informal to the formal by formal means.

The coal industry has been the backbone of America's energy independence for generations.

写作古文的难度，比登上青天还要难。

The constant pursuit of wisdom is the highest goal of life.

领导力不在于掌控，而在于照顾你所负责的人。

未来属于那些愿意承担经过计算的风险的人。

The process of verification is as important as the process of creation in computer science.

我们知晓过去但无法控制它，我们掌控未来但无法知晓它。