用兵之道，攻心为上，攻城为下。
释义：用兵的方法，以攻破敌人心理防线为上策，攻破城池为下策。
过去是一道永不消散的阴影。
夜晚并不总是带来答案，但它总是带来正确的问题。
The development of computational complexity theory has shown us that not all problems are created equal.
Innovation in aquaculture must balance economic growth with environmental stewardship.
The elegance of a mathematical proof often mirrors the efficiency of the algorithm it describes.
The great powers are always searching for opportunities to gain power at the expense of their rivals, and they will use force if they believe it will bring them strategic advantage.