col·lab·o·rate /kəˈlæbəˌret/
  (vi.)合作,協作,合夥,勾結
  collaborate
       v 1: work together on a common enterprise of project; "The
            soprano and the pianist did not get together very well";
            "We joined forces with another research group" [syn: join
            forces, cooperate, get together]
       2: cooperate as a traitor; "he collaborated with the Nazis when
          they occupied Paris"