an associate in an activity or endeavor or sphere of common interest;
"the musician and the librettist were collaborators"
"sexual partners"
例句
用作名词 (n.)
However, over a wide range of conditions, the wild-type cooperator can also invade a population of cheater cells. 此外，不论开始的酵母种群数量是多少，最后都会达到一种平衡状态，合作者和欺诈者同时存在。
美
[koʊ'ɒpəˌreɪtə]
