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.

youdao

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.

youdao