Mistakes are the best teachers. One does not learn from success. It is desirable to learn vicariously from other people's failures, but it gets much more firmly seared in when they are your own.
错误是最好的老师。人不能从成功中学到东西。从别人的失败中学习是可取的，但当别人的失败成为你自己的失败时，你会更加深刻地体会到这一点。
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Desirable
Teachers
Success