learn your lesson
US /lɜrn jʊər ˈlɛsən/
UK /lɜrn jʊər ˈlɛsən/
1.
吸取教訓, 得到教訓
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.
輸光所有錢後，他終於吸取了教訓，不再賭博。
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If you don't study, you'll fail the exam and learn your lesson the hard way.
如果你不學習，你會考試不及格，然後吸取慘痛的教訓。