run in
柯林斯詞典
1. V to run (an engine) gently, usually for a specified period when it is new, in order that the running surfaces may become polished (機(jī)器)磨合
2. N an argument or quarrel 爭(zhēng)論; 爭(zhēng)吵[非正式]
he had a run-in with the boss yesterday
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