聪明人由别人的错误获得教训蠢人由自己的错误获得教训
A wise man learns from others' mistakes, while a fool learns from his own
以上为机器翻译结果，长、整句建议使用 人工翻译 。
聪明人由别人的错误获得教训，蠢人由自己的错误获得教训。
Wise men learn by other men's mistakes (or harms); fools by their own.
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