somebody would give their right arm to do somethingWILLINGused to say that someone would be willing to do anything to get or do something because they want it very much 某人为了做某事而不惜任何代价 I’d give my right arm to be 21 again. 要是让我回到21岁，拿什么换都行。
somebody would give their right arm to do something• These parents would give their right arms to get their kids into a prestigious school.
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