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和平不是免费的,需要不断努力维护。
The pain of discipline is better than the pain of regret.
解析:良知是人天生具有的道德判断力,致良知是修身治国平天下的根本。
Language is the only tool we have to make sense of the world, and yet it is always inadequate.
The best way to optimize a program is to optimize it.
Productive thinking is characterized by the sudden appearance of the solution as an insight.
Innovation is not just about creating something new; it's about improving what already exists.