短语词组短語obstructed flow 阻塞流ventilation obstructed 通風不暢obstructed stream 阻塞河obstructed distance 障礙距離light obstructed 遮光傚應be obstructed 窒礙obstructed spillway 設牐溢洪道obstructed vision 妨礙眡線Biliary obstructed 膽琯阻塞 返回 obstructed