1flat piece of STH 某物的一片 [countableC]PIECE a thinflat piece of cloth, paper, skin etc that is fixed by one edge to a surface, which you can lift up easily 〔布、纸、皮等做的〕片状垂悬物
4.part of aircraft 飞机的一部分 [countableC]TTA a part of the wing of an aircraft that can be raised or lowered to help the aircraft go up or down 〔飞机的〕襟翼,副翼