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我不后悔我做过的事,我后悔的是有机会时没有做的事。
I don't regret the things I've done, I regret the things I didn't do when I had the chance.
The effects of policy changes are often more nuanced than simple economic models suggest.
年轻人不知道什么是谨慎,因此他们尝试不可能的事情——并且一代又一代地实现了它。