Coal’s future depends on our ability to make it cleaner and more efficient.

The quality of ideas seems to play a minor role in mass movement leadership. What counts is the arrogant gesture, the complete disregard of the opinion of others, the singlehanded defiance of the world.

写作是一种存在于世界的方式，一种理解它的方式。

"The pursuit of knowledge in computer science is a journey through a landscape of infinite possibilities."

人们自己创造自己的历史，但是他们并不是随心所欲地创造，并不是在他们自己选定的条件下创造，而是在直接碰到的、既定的、从过去承继下来的条件下创造。