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。

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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。

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The burst bubble has exposed more than Spain's addiction to construction, which at its height accounted for 13% of jobs.

泡沫的破灭暴露的不仅仅是西班牙对建筑业的痴迷。在其鼎盛时期，建筑业的用工比例是13%。

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Finally, at a height of almost 19km, the balloon burst and the payload fell back to earth helped along by a parachute.

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After his last sight of the pathetically stricken Brahms, stooped and fumbling with sausages over the stove, Mahler curiously burst out to a friend that he himself wanted to die at the height of his powers, before his works became weaker.

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