fortify by surrounding with trenches
trench coat
n. 军用防水短上衣
trench diarrhea
[医] 战壕腹泻
trench disease
[医] 战壕病
trench fever
[医] 战壕热, 五日热
trench foot
[医] 战壕足
trench hand
[医] 战壕手病(因冻伤所致的挛缩等)
trench knife
n. 在肉搏战时所用的双刃短刀
trench leg
[医] 战壕腿
trench lung
[医] 战壕肺
trench mortar
迫击炮
trench mouth
[医] 战壕口炎, 坏死性溃疡性龈炎
trench nephritis
[医] 战壕肾炎, 战争肾炎
trench on
接近, 侵犯, 侵占
trench rheumatism
[医] 战壕风湿病
trench shin
[医] 胫肌痛
trench throat
[医] 奋森氏咽峡炎
trench warfare
堑壕战
trench(for underground pipe line)
[化] 管沟
trench-hoe
[化] 挖沟机
trench-system
堑壕体系