飞船驾驶员,气球驾驶员轻于空气的航空器,例如气球的驾驶员或导航员。
A pilot or navigator of a lighter - than - air craft, such as a balloon.
就轻于空气的民用航空器而言,飞行中是指自其离开地面时起至其重新着地时止。
In the case of a civil aircraft lighter than air, the expression in flight relates to the period from the moment when it becomes detached from the surface until it becomes again attached thereto.
气球:一种大型气密球囊,内充热空气或轻于空气的气体(如氦或氢),以产生浮力,可在大气中上升和飘浮。
Balloon: Large airtight bag filled with hot air or a lighter-than-air gas such as helium or hydrogen that can rise and float in the atmosphere.
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