Ground Zero

名词解释

1、The target of a projectile, such as a missile or bomb.

爆破目标：投弹中的目标，如导弹或炸弹

2、The site directly below, directly above, or at the point of detonation of a nuclear weapon.

地面零点，爆心投影点：原子弹爆炸的正上方、正下方或爆炸点