underlipn.下唇underprep.低于；在 ... 下；在 ... 内；在 ... 控制下adv.在昏迷中；在 ... 下adj.下面的；从属的；少于的under keel clearance船底水深undermining sublevel分段下面拉底underhand hand-off上挑递棒法under sb's very eyes在某人面前公开地undercast air bridge下行风桥undershot distortion下过冲失真undersea exploration海下探测.underprivileged area贫困地区under the auspice of由…主办under the conduct of在