The North Pole has no land, only thick ice.

北极没有陆地，只有厚厚的冰层。

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Pure, thick ice absorbs a small amount of red light.

纯净而厚的冰吸收少量的红光。

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Not long after setting off, Eliyah spots a grey seal resting on some thick ice. He stops the boat and Tommy jumps out.

出发后不久，艾里亚就看见一头灰色的海豹在一块厚冰上休憩，他停下船来，汤米跃身跳出船去。

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Submarine crews practice surfacing the 8, 000-ton submarines, directly through thick ice or in nearby open waters, and learn to avoid hitting another ship.

FORBES: U.S. Navy Scrambles for Piece of Arctic Pie

But since the 1960s, satellites and aircraft with powerful radar devices have discovered more and more lakes buried kilometres beneath the thick ice sheet.

BBC: NEWS | Science/Nature | Secret rivers found in Antarctic

Working at a speed of two knots, HMS Protector broke the four-metre thick ice, which had trapped the cruise ship's bow, in two hours.

BBC: HMS Protector approaches MS Fram