| 单词 | high-altitude balloon |
| 释义 | high-altitude balloon To the eyes of a civilian witness in the 1950s, a high-altitude balloon recovery with attendant dummies would have seemed very unusual. Retrieved from Wikipedia CC BY-SA 3.0 In 1896 made the first in a series of several high-altitude balloon ascents. Retrieved from Wikipedia CC BY-SA 3.0 In 2012, the advanced engineering class launched and recovered a high-altitude balloon. Retrieved from Wikipedia CC BY-SA 3.0 These high-altitude balloon flights from 1947 to 1960 tested radiation exposure, physiological response, life support and recovery systems. Retrieved from Wikipedia CC BY-SA 3.0 The high-altitude balloons fly twice as high as airplanes, but below the range of satellites. Retrieved from Wikipedia CC BY-SA 3.0 |
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