They mix with ice in the air and fall to the ground as snow.

它们与空气中的冰混合，然后以雪的形式落在地上。

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An Air France-KLM Boeing 747 using a 50 per cent biofuel mix in one engine successfully completed a demonstration flight in the Netherlands in November 2009.

2009年11月，法航荷航集团的一架波音747客机曾在一个发动机中混入50%的生物燃料，并在荷兰成功完成了示范飞行。

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Such "microbubbles" are essentially "mirrors made of air," says Seitz, and they might be created off boats by using devices that mix water supercharged with compressed air into swirling jets of water.

Seitz说，这样的“微气泡”实事上就是“由气体组成的镜子”，用一些设备将增压的水和压缩空气混合放入涡流的喷气机中，在船外产生这些气泡。

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The researchers suspect that the newborn c-section babies might be picking up their generic bacteria mix from the air - one way bacteria gets on our skin.

VOA: standard.2010.06.30

Pouring from one container to the next can cause air to mix into the milk.

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It will air a mix of news, information, discussion programmes and debates for 12 hours a day.

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It works by forcing fuel directly into the combustion chamber of each cylinder to mix air and gas simultaneously at the point of combustion, rather than mixing air and gas in a separate chamber like more conventional engines.

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