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“痛改前非”，汉语成语，意思是彻底改正以前所犯的错误。可以翻译为“sincerely mend one’s ways或thoroughly rectify one’s errors”等。
例句：
痛改前非，重新做人
sincerely mend one’s ways and turn over a new leaf
他来信表明愿意痛改前非。
His letter bespeaks his willingness to mend his ways.
Editor: Jade
