strategic bomb line

例句：

1. 1. The strategic bomb line was acrucial factor in the war.
   战略轰炸线是战争中一个至关重要的因素。
2. 2. The strategicbomb line was used toprotect the city from enemy attacks.
   战略轰炸线被用来保护城市免受敌人的攻击。
3. 3. The strategic bomb line was amajor concern for the military during the war.
   战略轰炸线是战争期间军事的主要关注点。