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 network environment网络环境under the veil of charity假托慈善之名under-purlin insulation檩下保温层under sampling technology欠采样技术under penalty of estoppel不准否认或提出抗辩的制裁under-allocated expense少分配的费用undergrount railway screen屏蔽门系统under-pan optimal design护底优化under-water concrete mix水下混凝土混合料under penalty of a forfeit违者罚款