It appears to be still deep frozen under a surface of ice, cracking and thawing.

这似乎是下仍然深度冷冻的冰面，有开裂和融化。

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Many overwintering organisms produce antifreeze proteins that can be adsorbed onto the surface of ice crystals and modify their growth.

很多越冬的生物会产生抗冻蛋白，这些抗冻蛋白能够吸附到冰晶的表面改变冰晶形态并抑制冰晶的生长。

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Many overwintering organisms produce antifreeze proteins (AFPs) that can be adsorbed onto the surface of ice crystals and modify their growth.

很多越冬的生物会产生抗冻蛋白，这些抗冻蛋白能够吸附到冰晶的表面改变冰晶形态并抑制冰晶的生长。

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The torpedo-shaped instrument gathers data about the difference between the level of the seawater beneath the ice and the surface of the ice itself.

BBC: Arctic ice melting at 'amazing' speed, scientists find

The Greenland ice sheets cover 1.7m square km an area only a little smaller than Mexico and the surface of the ice rises to an altitude of 3km.

ECONOMIST: Climate change (II)

It is on that surface of the ice that they have adapted ways of catching seals that are their principal prey.

CNN: Polar bear now listed as 'threatened' species