carbon dioxide ice

基本解釋

The white material at the top of the cliff, near the planet's north pole, is carbon dioxide ice.
照片上顯示的懸崖上的白色物質(zhì)是位于火星北極地區(qū)的干冰。
Spring has sprung on Mars, bring with itthe disappearance of carbon dioxide ice (dry ice) that covers the northpolar sand dunes.
春天在火星上躍動，覆蓋在北極沙丘上的二氧化碳干冰消失了。
At that time, dark sand on the interior of Martian sand dunes became more and more visible as the spring Sun melted the lighter carbon dioxide ice.
火星沙丘內(nèi)部的暗沙，隨著春日的陽光融化較薄的干冰而逐漸清晰可見。

Much of it resulted from volcanoes blasting out gases like carbon dioxide and water vapour, which allowed ice (also a mineral) to form near the poles of Earth, and possibly on Mars too.
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This is based on the way the climate behaved about 20, 000 years ago, at the peak of the last ice age, a period when carbon-dioxide concentrations leapt.
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The seasonal increase results from tons of carbon dioxide, which had been frozen into a southern winter ice cap, returning into the atmosphere as southern spring turns to summer.
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