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。
2
During the ascent the balloon is constantly widening because of the decrease of atmospheric pressure, and at a certain height it will inevitably burst.
在上升的过程中，随着气压的降低，气球不断膨胀，到一定的高度，气球就会爆破。
3
It gives a quantitative relation among the specified burstheight, initiation precision, operating reliability and ideal burst height of the fuze used in the intelligent fuze system.