重返大气层的航天器受到重力的作用。
Spacecraft which are re-entering the earth's atmosphere are affected by g forces.
航天器减慢了速度，开始重返大气层。
宇宙飞船重返大气层。
太空船重返大气层。
本文首先简要介绍回收型卫星重返大气层概貌。
In this paper, the outline of reentry atmosphere for the recoverable satellites is presented.
要避免这种活性气体从断裂的岩石逃逸重返大气层又该怎么办呢？
But what's to keep the buoyant gas from working its way up through fractured rock and reentering the atmosphere?
研究了通过雷达观测跟踪重返大气层阶段的弹道目标问题。
It is studied the problem of tracking a ballistic object in reentry phase from radar observations.
第一个领域是重返大气层问题，在50年代中期这成为一个前沿课题。
The first was the re-entry problem, which came to the forefront during the mid-1950s.
不过美国太空总署表示脱落部分未对明天的重返大气层和着陆造成威胁。
A metal clip broke off space shuttle Discovery's brakes, but NASA says the missing part doesn't pose a threat for tomorrow's re-entry and landing.
早先的几次太空任务皆有重返大气层的程序，但不是所有的航天飞机都顺利返航了。
Several early space missions involved re-entry procedures, but not every spacecraft was recovered.
最后，在围绕地球的轨道运行的时候，计算机会精确地计算出应该在什么时候发射制动火箭以重返大气层。
Finally, when in orbit round the earth, the calculators calculate exactly when to fire the retro-rocket to effect re-entry.
航天飞机的发动机和耐热瓷砖防止其再重返大气层时被烧坏，但是维护成本也很昂贵，而分配不同承包人的任务时又增加了开销。
The shuttle’s engines and the tiles that protect it from the heat of re-entry proved expensive to maintain, and divvying up work among different contractors added to the costs.
该探测器绕地球两圈后，再以20000英里（32000千米）的时速重返大气层，该速度超过了时速为17500英里（28000千米）的返航太空船。
After circling Earth twice, it would slam back into the atmosphere at more than 20, 000mph (32, 000kph), eclipsing the 17, 500mph (28, 000kph) speed of a returning space shuttle.
航天飞机重返地球大气层时因有摩擦力而减慢速度。
The force of friction slows the spacecraft down as it re-enters the earth's atmosphere.
航天飞机现已重返地球大气层。
大多数的目击后来认为是重返地球大气层的俄罗斯火箭。
Most of the sightings were later attributed to a Russian rocket re-entering the earth's atmosphere.
太空船成功地重返地球大气层。
The spacecraft made a successful reentry into the earth's atmosphere.
太空船成功地重返地球大气层。
The spacecraft made a successful reentry into the earth's atmosphere.
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