The brunt of the russian attack fell at first upon the frontier defences of the finns in the karelian isthmus . 苏联进攻的主力，最先是集中在卡累利阿地峡芬兰的边境防御工事。
In the court, dick found a part of the garrison, busy with preparations for defence, and gloomily discussing the chances of a siege . 狄克在院子里，看到一部分卫兵，一边忙乱地做着防御工事，一边焦虑地讨论着被围困的可能性。
This would turn the maginot line and would not entail the losses likely to be sustained in a frontal attack against permanent fortifications . 这种进攻也会绕过马奇诺防线，并且可以避免对永久性的防御工事正面进攻可能遭受的损失。
You learned that autumn, he thought, how to endure and how to ignore suffering in the long time of cold and wetness, of mud and of digging and fortifying . 他想，那年秋天你学会了怎样长时间地在寒冷，潮湿，泥泞以及掘壕沟，筑工事的活动中坚持下去，不畏艰苦。
Simple installation without special foundation 安装简易无需特殊的基础工事。
The defenses of the city must be strengthened 这个城市的防御工事必须加强。
On the news that macarthur had invaded 把150名美国战俘赶进防空工事活活烧死
On the news that macarthur had invaded 把150名美国战俘赶进防空工事活活烧死
When the war ended all defences stopped , too 战争结束时防御工事也停止了。
Our artillery smashed the enemy defenses 我们的炮兵摧毁了敌人的防御工事。
