An air burst is an explosion in which a weapon is detonated in air at an altitude below 30 km but at sufficient height that the fireball does not contact the surface of the earth.
空中爆炸指的是核爆发生在海拔30公里以下，且火球有足够高度不接触到地面。
An actual contact surface burst leads to the highest possible overpressures near ground zero.
对于实际接触表面爆炸情况，在地面零点附近可形成最大的超压力。
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