Icebergs are large pieces of freshwater ice that break off snow-formed ice shelves or glaciers and float in open water.

冰山是由雪形成的冰架或冰川断裂而成，主要由淡水冰组成，一般漂浮在开阔海域。

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As the geysers reach Enceladus' frigid surface, the water freezes and some of the sodium remains trapped within the newly formed ice crystals.

当土卫二内部的液体水被喷发到土卫二寒冷的表面之后，这些液体水被寒冷的气温冻结成冰晶的同时，那些本来就存在于液体水中的钠元素也随之冻结成冰。

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No air bubbles were present in the green ice, suggesting that the ice was not formed from the compression of snow but instead from the freezing of seawater.

绿色冰层中不含气泡，这表明了这种冰层是由冻结的海水形成的，而不是凝结压紧的积雪。

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Many of the lakes around the Grand Tetons were formed millions of years ago by slow-moving sheets of ice.

VOA: special.2009.02.16

It has high mountains. It has valleys formed by ancient ice that cut deep into the Earth millions of years ago.

VOA: special.2009.01.07

The scientists say that ice formed less than one year earlier covered almost half of the extent.

VOA: special.2009.10.27

The 750 or so icebergs that break off from glaciers each year and drift south from Greenland are floating masses of freshwater ice formed in the pristine air of 3, 000 B.

FORBES: It's The Tap Of The Iceberg

The 750 or so icebergs that break off from glaciers each year and drift south from Greenland are floating masses of freshwater ice formed in the pristine air of 5, 000 years ago.

FORBES: It's The Tap Of The Iceberg

Mark Maslin of the Environmental Change Research Centre at University College, London, believes that the spike was caused mainly by emissions from tropical wetlands and peat bogs that formed as the ice retreated.

ECONOMIST: Methane and climate change