un off 有逃跑的意思
字典的中的解释：PHRASAL VERB If you run off with someone,you secretly go away with them in order to live with them or marry them.(与某人) 私奔
在我们的汉英字典上也有这样的解释：
run off 跑掉；迅速离开：
You must run off now.The rain is coming.
雨来了,你现在快走吧.
run away =run off
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