rocket balloon instrument 火箭气球装置
balloon borne rocket 气球发射火箭
balloon-type rocket [航] 增压式火箭
balloon-launched rocket 气球发射火箭
balloon n borne rocket 气球发射火箭
The advantage of the balloon is that it will be cheaper than a space plane or rocket.
气球的优点是它比航天飞机或火箭便宜。
And therefore, when you let it go the balloon will go in this direction which is the basic idea behind the rocket.
此时放手，气球会向此方向飞出，火箭就是照这个思路设计出来的。
Ultraviolet sensitive photocathodes are also used in cameras in rocket and balloon-bome experiments.
火箭和气球实验的电子照相机中，还使用紫外敏感的光电阴极。
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