One that is exactly like another; a counterpart.
成对的一方确实与另一个相似的人或物；相应物
The rear benches in the House of Commons where junior members of Parliament sit behind government officeholders and their counterparts in the opposition party.
后座议员席英下议院后排座的议员席，议会中职位较低的成员坐在政府官员和对立党成员的后面
