Contravallation

[,kɒntrәvә'leiʃәn]

解释:

(n.) A trench guarded with a parapet, constructed by besiegers, to secure themselves and check sallies of the besieged.

校对:莱利亚

解释:

n. a fortification built by besiegers about the place invested.

编辑:尼特