科技创新是解决煤炭行业问题的根本途径。

We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.

To write is to embark on a journey of self-discovery, where each word is a step closer to understanding the essence of our existence.

The truth is rarely pure and never simple.

地理学是关于地方的科学，而不是关于人的科学。