undermanvt.使人员配备不足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 - ground pipeline埋地管道under-the-cover modem集成调制解调器,分立式调制解调器under the watchful eye of在 ... 的看管下under-seawater concrete海工混凝土under - age delinquency未成年人犯罪under favourable auspices顺利地underflow characteristics下溢特性under medical supervision遵循医嘱underrunning bridge crane下行桥式起重机under - developed areas欠发达地区