The sun's emissions of UV light are not uniform, so as it rotates UV-bright regions move in and out of view of Earth.

太阳所发出的紫外光是不统一的，所以由于太阳的自转地球所吸收的紫外光的数量也就不同。

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Adding another planet, especially a bullying Jupiter-sized planet, can mess with orbits and make a once-hospitable planet move in and out of the habitable zone over time.

如果多出另外一颗行星，特别是木星大小的霸王行星，就会将轨道变乱，使得曾经宜居的行星时而进入、时而移出可居住区。

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A big challenge for the industry is to create a fully active ETF that is able to move in and out of individual stocks, like a traditional mutual fund, while being tradable, like a stock.

这一行业的一个挑战就是创造出一种充分活跃的ETF，即能像共同基金那样进出个股，又能像股票那样可交易。

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KickStart says the sale of its pumps has helped to move nearly half a million people out of poverty in Kenya,Tanzania, Mali and Burkina Faso.

VOA: standard.2010.08.09

It does so because there are some molecules in the surface of the membrane that allow glucose to move in and out.

而这个过程的完成依赖于,膜表面存在的一些分子,这些分子能够将葡萄糖运进或者运出细胞

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Good question, so there is this little reading head kind of like in an old phonograph player that does move back and forth and in and out depending on the implementation.

好问题，这就像,老留声机里的小读头,它通过来回移动,来完成不同的操作。

哈佛公开课 - 计算机科学课程节选

Ds that move in and out, " he says, "and this has been generating a lot of energy.

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But active ETFs move in and out of stocks in a bid to beat the market, i.e.

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Data needs to move in and out of analytics systems (like Netezza) fast.

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