underpann.底盘(拖盘)
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
underlying topography下垫面地形
underlining shortcuts对快捷方式加下划线
underbalance drilling欠平衡钻井
undertaking to appear允诺出庭
under the castle wall在城墙下
undershirt under vestn.汗衫
under no circumstance在任何情况下都不
underveloped property[经] 未开发的财产
under water luminaire水下照明灯
underrun the aircraft从下方超越飞机