learn your lesson
US /lɜrn jʊər ˈlɛsən/
UK /lɜrn jʊər ˈlɛsən/
1.
吸取教训, 得到教训
to suffer a bad experience and understand from it not to do the same thing again
:
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After losing all his money, he finally learned his lesson about gambling.
输光所有钱后，他终于吸取了教训，不再赌博。
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If you don't study, you'll fail the exam and learn your lesson the hard way.
如果你不学习，你会考试不及格，然后吸取惨痛的教训。