【简答题】
middleman n. 中间商,中间人 agent n. 代理商,代理人 linkage n. 联系;关联 establishment n. 机构;企业 be engaged in 从事;忙于 attend v. 照顾;关注 a) : to take part in a particular activity b) : a connection made between two or more things c) : to look after someone d) : a shop, business, or an organization e) : a person or company that does business for another person or company f) : a person or company that buys things from producers and sells them to customers at a profit
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