used in reference to a person seen in terms of their participation in a task一起做某事的人，帮手
柯林斯高阶英汉双解学习词典释义
N-COUNT
双；对；副
A pair of things are two things of the same size and shape that are used together or are both part of something, for example shoes, earrings, or parts of the body.
1. a set of two similar things considered as a unit
2. two items of the same kind
3. two people considered as a unit
4. a poker hand with 2 cards of the same value
Verb
1. form a pair or pairs;
"The two old friends paired off"
2. bring two objects, ideas, or people together;
"This fact is coupled to the other one""Matchmaker, can you match my daughter with a nice young man?""The student was paired with a partner for collaboration on the project"