relieve the trenches

英语单... ... open the trenches 掘战壕; 开沟 relieve the trenches 与战壕里的兵换班 search the trenches (用开花弹)攻击战壕 ...

... open the trenches 开始挖壕沟 relieve the trenches 和战壕里的兵换防 search the trenches (用天花弹或榴弹炮等)轰击战壕 ...