小南子zzz
这个要看你的"主要经营"是什么词了,如果是动词,可以用specializein,mainlydealin/with,如果是名词可以用:Principalbusiness,
小七木瓜
self management自我管理operate independently独立经营carry out autonomous operation and assume sole responsibility for profits or losses自负盈亏autonomous management自治经营conduct autonomous management自主经营manage their business on their own独立经营business autonomy经营自主
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