apposition
noun [ U ] language specialized uk/ˌæp.əˈzɪʃ.ən/ us/ˌæp.əˈzɪʃ.ən/
同位（关系）;同位语
in grammar, a situation in which two nouns or noun phrases are used to refer to the same person or thing
In the expression "my brother Joe", "my brother" and "Joe" are in apposition. 在短语my brother Joe中，my brother 和 Joe 是同位语。