collaborate/collaboration

collaborate /kəˌlæbəˈreit/ vi. 合作，协作，勾结：collaborate on a book和著一本书；collaborate with the enemy与敌人勾结［考句］Mary once collaborated with another musician to compose a piece of pop music. 玛丽和另一位音乐家合创了一首流行音乐。

collaboration /kəˌlæbəˈreiʃən/ n. ［u］合作，协作；勾结：work in close collaboration 密切合作；be convicted of collaboration with the enemy 被定为通敌罪 in collaboration with 与…合作，与…勾结：He compiled a dictionary in collaboration with some senior professors.他与几位老教授合编词典。