1. The government has started building fortifications along its eastern border. 政府已经开展了沿东部边境建造防御工事的工程。
2. A large number of troops stayed in the new province, and these troops had a considerable impact on Britain with their camps, fortifications, and participation in the local economy. 当时有大量军队驻扎在这个新省份，这些军队的营地、防御工事以及他们对当地经济的参与对英国产生了相当大的影响。
3. You have to have people who live in these fortifications. 在这些防御工事中必须有人驻扎。
4. We directed all our guns against the enemy fortifications. 我们把炮口都对准了敌人的工事。
5. He then invested in infrastructure and built massive fortifications. 随后，他把精力投入到基础设施和防御工事的建造上。
