opposite number

opposite-number的词性：
n.（名词）

1. A person who holds a position in an organization or a system that corresponds to that of a person in another organization or system; a counterpart:
处于对应地位的人：与在对应的系统或组织中的特定成员担任相同职位的人，对手.：

“had a face-to-face . . . conference with his opposite number at the American Embassy”(Frederick Forsyth)
“在美国大使馆中与他的对手举行了面对面的会谈”(弗雷德里克·福赛思)