The length of time the lidar’s light pulse takes to return to the satellite provides information about where the clouds or particles are in the atmosphere.

激光雷达的光脉冲返回卫星所消耗的时间提供了大气中云或者粒子的位置信息。

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To an observer onthe planet’s surface, the satellite seems to return to the same place in thesky at exactly the same time every day.

对于地球上的观察者来说，卫星看起来每天都在完全相同的时刻回到天上同一位置。

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They reach the satellite and return to the earth in less than a second.

它们抵达人造卫星再返回地球所用的时间不用一秒钟。

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Back then,there was much hope that humans would return soon and make a home on Earth's only natural satellite.

VOA: special.2010.04.28

The Upper Atmosphere Research Satellite (UARS) is the largest American space agency satellite to return uncontrolled into the atmosphere in about 30 years.

BBC: Nasa's UARS satellite falls off west coast of US

Experts say they will get a more precise idea in the last 12 hours before the satellite is due to return.

BBC: Nasa refines satellite crash time

Yene says he gave Herman money -- in one instance, cash in an envelope -- in return for her influence, including helping someone secure an FCC license for a satellite telephone system.

CNN: Herman Focus Of Influence-Peddling Probe