写作是一种自由的行为，但也是一种责任。

"The essence of mathematics is not to make simple things complicated, but to make complicated things simple."

Coal has powered our past, but we must be honest about its role in our future.

"The way you think about time changes as you get older."

翻译：君子应当摆正自己的位置，坚守自己的使命。