For example, if a rover on Mars needs to send data to Earth, it would first need to store the data until it was within range of an orbiting satellite.

如果有个漫游机器人在火星表面有信息传回地球，机器人会先将数据保存起来，等到卫星绕到了可以接收信号的轨道范围再发送出去；

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The satellite was deactivated in 2005 as it ran out of fuel and was left orbiting Earth like a big piece of space junk.

这颗卫星于2005年由于燃油耗尽报废，并像一大块宇宙垃圾一样被扔在了飞行轨道上。

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Explanation: A symphony of planet-wide observations began abruptly on March 28 when the Earth-orbiting Swift satellite detected a burst of high-frequency gamma-rays from GRB 110328A.

解说： 一场世界规模的观察交响曲在 3 月 28 日突然开始了，当时环绕地球的 Swift 卫星监测到了来自 GRB 110328A 的高频伽马射线爆发。

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Wall says the event, as well as the Soviets launching the first Earth-orbiting satellite four years before, could have been just what the U.S needed.

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