Noun:

1. defensive structure consisting of walls or mounds built around a stronghold to strengthen it

2. the art or science of strengthening defenses

3. the addition of an ingredient for the purpose of enrichment (as the addition of alcohol to wine or the addition of vitamins to food)

defensen.防卫；防卫物；辩护vt.防守

moatn.壕沟；护城河v.将…围以壕沟

blockaden.【C】封锁；阻碍物vt.封锁；挡住

towern.塔；高楼vi.高耸；胜过

embankmentn.堤防；筑堤

barriern.栅栏；障碍物；屏障

securityn.安全；保证；证券；债券；抵押；防护措施

walln.墙壁；垣；墙状物v.围住；隔开；演戏般地转动(眼睛)

fortn.堡垒；要塞

barricaden.【C】路障；街垒；障碍物；栅栏n.(常用复数形式)barricades:有激烈争论的领域或议题vt.设路障挡住；阻拦；封锁

strongholdn.要塞；堡垒；中心地

refreshmentn.恢复；精神爽快；提神之事物（复数）refreshments:点心； 茶点.

inspirationn.灵感；鼓舞人心(的东西)；吸气

buttressesn.桥墩

protectionn.保护；防卫

defencen.防御；答辩；防务

reinforcementn.增强；加固；强化物；增援力量

building upn.装配(安装；建造；组成；堆起；积累)

munitionadj.军火的(复)munitions：.n.军火；军需品

1. In the distance the fortification of an Afghan army and police post was visible.
   远处，可以看到阿富汗政府军的防御工事和警察的据点。