The most elegant proofs are those that reveal the heart of the problem with clarity.

煤炭工业是美国的支柱。

作为一个导演，最难的事情是弄清楚接下来该做什么。

自信是关键，但你必须用实力来支撑它。

"The past is always tense, the future perfect."

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

把灯笼背在背上的人，有黑影遮住前路。