carbon dioxide ice

基本解释

The white material at the top of the cliff, near the planet's north pole, is carbon dioxide ice.
照片上显示的悬崖上的白色物质是位于火星北极地区的干冰。
Spring has sprung on Mars, bring with itthe disappearance of carbon dioxide ice (dry ice) that covers the northpolar sand dunes.
春天在火星上跃动，覆盖在北极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.
火星沙丘内部的暗沙，随着春日的阳光融化较薄的干冰而逐渐清晰可见。

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.
ECONOMIST: Minerals
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.
FORBES: Climate Change Is Now Less Of a Problem. So We Need To Do Less About Climate Change
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.
ENGADGET: Curiosity rover finds radiation levels on Mars are safe for humans