Senses
掩护/ 掩護 shield
· to provide protection or concealment to someone or something, especially in a tactical or military context
坦克在前方掩护步兵进攻。
掩护/ 掩護 cover
· something that serves as a screen, protection, or a means of concealment
他们利用夜色的掩护成功越过了边境。