这架隐形轰炸机未被察觉地飞越了敌方领空。

The stealth ___bomber flew undetected through enemy airspace.

战争期间，敌军轰炸机持续不断的轰鸣声对平民来说是可怕的声音。

During the war, the constant roar of enemy ___bombers was a terrifying sound for civilians.

空军为这项战略任务部署了一个远程轰炸机中队。

The air force deployed a squadron of long-range ___bombers for the strategic mission.