counterpart

名词 counterpart:

1. a person or thing having the same function or characteristics as another
   同义词：opposite number, vis-a-vis
2. a duplicate copy
   同义词：similitude, twin

1. Night is the counterpart of day.
   黑夜与白天相辅相成。
2. One that is foreshadowed by or identified with an earlier symbol or type, such as a figure in the New Testament who has a counterpart in the Old Testament.
   先前原形先前的标记或模型所预示或表明的原形，如《新约》中的人物在《旧约》中有对应的形象
3. I racked my memory in vain for its counterpart in literature: perhaps you could think of one.
   我绞尽脑汁也想不出它在文学中的对等物，也许你可以想出一个。

coun.ter.part

n.（名词）

One that closely resembles another.
相似物：与另一物极相似的东西
One that has the same functions and characteristics as another; an opposite number:
对手方相应的人或物：与另一个具有相同的功能或特点的人或物；对策的人：
例句：
The foreign minister is the counterpart of the secretary of state.
外交部长是和国务秘书对等的人

A copy or duplicate of a legal paper.
复制品，副本：法律文本的复制品或副本

One of two parts that fit and complete each other.
配对物：两个互相搭配或一体的部分之一
One that serves as a complement.
补充品：作为补充的物或人