参考词典中fortifications的常规释义：
基本释义
参考例句
- They assailed a stupendous fortification.
他们袭击了一个大要塞。 - the magistral line of fortifications.
防御工事的主线 - emplace a fortification on the hilltop.
在山顶修筑了防御工事 - An earthen fortification;an earthen pot.
土制筑垒;陶罐 - These fortifications were all built during the last war.
这些防御工事都是上次战争时修筑的.
鲁公网安备 37060202000128号 
