co·op·er·ate /koˈɑpəˌret/
  (vi.)合作,協力,配合
  Co·öp·er·ate v. i. [imp. & p. p. Cooperated; p. pr. & vb. n. Cooperating.]  To act or operate jointly with another or others; to concur in action, effort, or effect.
     Whate'er cooperates to the common mirth.   --Crashaw.
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  cooperate
       v : 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: collaborate,
            join forces, get together]