A defunct satellite the size of a school bus is falling back to Earth.

一个失去功能的卫星，与校车大小接近的残余物将会落到地球上。

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And the collision of an American commercial satellite and a defunct Russian military one has just added thousands more pieces of debris.

并且美国的商业卫星与俄罗斯的一无效军事卫星相撞过程中，又给太空增加了成千上万片的垃圾。

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A defunct U.S. satellite is expected to crash down to Earth Friday, with nobody knowing where or when exactly it will hit.

一颗美国报废卫星将会在周五撞击地球，然而却没有知道这枚卫星具体会在哪里着陆。

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The novelty Dr Lappas envisages is to change the angle of the sail when the satellite has become defunct.

ECONOMIST: A satellite that tidies up after itself