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underseam下层

1. Crimes committed under cover of patriotism.
   打著爱国的旗号犯下的罪行。
2. The soldiers crept forward under cover of darkness.
   士兵在夜色的掩护下匍匐前进。
3. We travelled under cover of darkness.
   我们在夜幕掩护下行进。