气球的优点是它比航天飞机或火箭便宜。
The advantage of the balloon is that it will be cheaper than a space plane or 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。
And therefore, when you let it go the balloon will go in this direction which is the basic idea behind the rocket.
航空摄影的支持平台包括固定翼机、直升机、热气球、小型飞艇、飞船、火箭、风筝、杆子、降落伞和车载撑杆。
Platforms for aerial photography include fixed-wingaircraft, helicopters, balloons, blimps and dirigibles, rockets, kites, poles, parachutes, vehicle mounted poles .
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。
Ultraviolet sensitive photocathodes are also used in cameras in rocket and balloon-bome experiments.
之后孩子们制作自己的滑翔机，火箭，操作模拟器，观看航空传说，讲述他们的故事，驾驶热气球和诸如此类的活动。
After all, kids get to build their own gliders and rockets, fly simulators, see aviation legends tell their stories, ride in a tethered hot-air balloon, and so much more.
进一步开展从地面站、探空火箭和气球探测取得更多的地基现场观测数据的工作。
Ground-based in situ observations will be enhanced from ground stations as well as from sounding rockets and balloons.
中国在二十世纪六十年代初期开始利用探空火箭、探空气球开展了高层大气探测。
China started to explore the upper atmosphere using rockets and balloons in the early 1960s.
中国在二十世纪六十年代初期开始利用探空火箭、探空气球开展了高层大气探测。
China started to explore the upper atmosphere using rockets and balloons in the early 1960s.
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