strategic bomb line

• 战略轰炸线

strategic bomb line的用法和样例：

例句

1. He stared woodenly at the bomb line on the map and ruminated hypnotically on the fact that there was no escape.
   他一直呆呆地望着那地图上的轰炸线，失魂落魄地反复想着，这次是逃避不了啦。