Over the past few decades a unique class of satellites has been created that fits the bill: CubeSats.

在过去的几十年里，一种独特的卫星应运而生：立方体卫星。

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Over the past few decades, everything has changed.

过去的几十年，一切都发生了变化。

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Over the past few decades, cancer survival rates have significantly increased.

过去的数十年里，肿瘤生存率有着显著的提升。

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Over the past few decades,however, scientists have determined that even trace amounts of lead in children's bodies leads to long-term neurological and behavioral problems.

VOA: standard.2009.12.19

Still, Levin says, over the past few decades the opportunity to take profits in biotech has remained steady.

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This is supported by virtually all quality scholarly work over the past few decades.

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Over the past few decades, this cynical notion has infected the entire job hierarchy.

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