fortification

名词 fortification:

1. defensive structure consisting of walls or mounds built around a stronghold to strengthen it
   同义词：munition
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)

1. These fortifications were built during the last war.
   这些防御工事是上次战争时修建的。
2. This is a plan for the fortification of the city.
   这是一个加强城市防御的计划。

for.ti.fi.ca.tion

n.Abbr. fort.,ft.（名词）缩写 fort.,ft.

The science of fortifying.
筑城学
The act or process of fortifying.
筑城：筑城的行动或步骤
Something that serves to fortify, especially military works erected to fortify a position or place.
防御工事：用于筑城的东西，尤指采取军事行动防御一个位置或地方