collaboration

n.合作，协作

cold, cold chisel, cold cream, cold cuts, cold frame, cold snap, cold sore, cold storage, cold sweat, cold war, cold-blooded, cold-hearted, cold-shoulder, coldly, coldness, coleslaw, colic, colicky, colitis, collaborate, collaborative, collaborator, collage, collapse, collapsible, collar, collar-bone, collar-stud, collate, collateral, collation, colleague, collect, collected, collectedly, collection, collective, collective bargaining, collective farm, collective noun,