That is what learning is. You suddenly understand something you've understood all your life, but in a new way.
这就是学习。你突然以一种新的方式理解了你一生都在理解的东西。
煤炭是我国的主体能源,在相当长时期内仍将是我国能源安全的基石。
过去从未死去,它甚至还没有过去。
I don't want to be sexy, I want to be iconic.
Every problem in mathematics is an opportunity to learn something new.