trench warfare
美 
英 
- na.阵地战
 - 网络堑壕战;壕沟;战壕进行堑壕战
 
un.  | 1. 阵地战  | 
n.  | 1. a form of warfare in which armies conduct attacks on each other from opposing positions in fortified trenches 2. a long-standing and bitter conflict in which opposing parties continually attack each other 3. a situation in which soldiers in trenches opposite each other fight for a long time without either side winning or making progress  |