| 词汇 | reciprocity | 
| 释义 | reciprocity  noun [ U ]  formal uk/ˌres.ɪˈprɒs.ə.ti/ us/ˌres.ɪˈprɑː.sə.t̬i/  互助;互惠;互换 behaviour in which two people or groups of people give each other help and advantages | 
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