Thin river ice is a significant issue because winter travel is mainly achieved by using the frozen rivers as a transportation route via snow machines or sled dogs.

河面上的冰层十分重要，当地人冬季出行主要就是通过雪车或狗拉雪橇走冰面上的交通路线。

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The first beta of MacRuby 0.5 is available, currently only for Snow Leopard (MacOS X 10.6) machines.

MacRuby 0.5的首个beta版已经有了，目前仅适用于Snow Leopard（MacOS X 10.6）机器。

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Snow Leopard simply won't work on these machines, including models designated as G4 or G5 and sold as recently as 2006.

雪豹不能在这些电脑上运行，包括命名为G4或G5，在2006年以前出售的机型。

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Today,special machines are used to produce limited amounts of snow for winter holiday ski areas.

VOA: special.2010.01.05

For months, machines there have been producing and storing snow.

VOA: special.2010.02.10

The snow machines Sochi installed operate in 50 degrees fahrenheit or below.

WSJ: Menu

They expect to have 250, 000 cubic meters saved up by the games an emergency backup supply in case the 430 snow machines that are being installed don't suffice.

WSJ: Menu

The firm had already been forced to rush out security updates for machines working on its newer Snow Leopard and Lion operating systems.

BBC: Apple releases Flashback patch for older OS