on business的on是什么词性

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词性: 介词为了公事，出差I have to go to Rome on business.我得去罗马出差。

Are you traveling on business or for pleasure 你这次旅行是为了公务还是游玩？His business empire was vast.他的企业规模庞大。I always fly business class.我总是乘坐商务舱旅行。He owns a dry cleaning business.他做干洗生意。She works in the family business.她在家族的企业工作。She runs the business by herself.她自己经营这项生意。

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注册消防工程师

on business的on 在这里是介词