我的爸爸是一个商人，他很忙，他早上很早出去，晚上很晚下班回家。
My father is businessman, he is very busy, he goes to work early and comes home from work late.
youdao
我的爸爸是个商人，他是一个公司的经理。
My father is a businessman. He's a manager of a company.
我的爸爸是一个广告商人，同时也是一位美术老师。
My father is an adman meanwhile an art instructor.
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