underfurn.(海獭、海豹等的)下层绒毛
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
undercarriage track起落架轮距
under water welding水下焊
underhand allowance秘密津贴
under an anesthetic上了麻醉药
underrunning bridge沿轨道下翼缘行走的桥架
underlying surfaces下垫面
under a flying seal以开口信
under tail-covers后覆尾羽
under the stress of在 ... 的压力下
undertaking revenue事业收入