英德
有道
百度
谷歌
图片
维基
百科
自由降落
free fall
- 他对极限跳伞的追求开始于1988年9月。 那时的法国空军机构选中他去做近天的自由降落和跳伞运动。
His quest began in September 1988, when the French space agency selected him to free fall and parachute from near-space. - 经过一些时间的自由降落后，落体运动得很快，以至空气拽力（阻力）与落体的重量相等，于是就没有加速度了。
After some time of uninterrupted fall, the body is moving so rapidly that the drag of the air is as great as the weight of the body, so that there is no acceleration. - 首次担任指令长的斯科特凯利和飞行员查理赫伯引导着航天飞机冒着炽热进入大气层，在经过一个钟头的自由降落之后向地面进发。
Scott Kelly, a first-time commander, and pilot Charlie Hobaugh guided the shuttle on its fiery plunge through the atmosphere and hour-long free-fall descent back to Earth.
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