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1·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。

2·Its surface temperature matches that of carbon dioxide ice, but might water ice lie underneath?

那里的地面温度符合使二氧化碳冰冻的温度，但在那之下是否还潜伏著水冰？

3·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。

4·A thaw occurs each spring in the Northern Hemisphere of Mars, as the warming climate causes solid carbon dioxide ice to sublimate directly to vapor.

火星北半球每到春天来临都会发生一次解冻，温暖的气候造成了固态的二氧化碳冰直接升华成气体。

5·Spring on Mars sees plumes of carbon dioxide vaporizing from solid blocks of dry ice as they warm up in the sunlight.

每年春季，火星表面的干冰(固体二氧化碳)在阳光照射下，会由固态升华为气态。

6·The photographs actually show sand dunes coated with a thin layer of frozen carbon dioxide, or dry ice, less than 240 miles from the planet's north pole.

这张图片实际显示的，是距离火星北极不足240英里的沙丘上覆盖的一层薄薄的冰冻二氧化碳、或干冰。

7·The ice cap could be thinner and still protect water if it were topped with a layer of frozen atmospheric gas, such as dry ice, which is solid carbon dioxide.

若冰层上方还存在一层固态气体层，如干冰——二氧化碳的固态形式，维持液态水存在的冰层厚度要求就能相对降低。

8·During winter, carbon dioxide condenses out of the atmosphere and forms a frost of dry ice that coats the planet's polar region.

在冬季时，二氧化碳脱离大气冷凝成固体二氧化碳(干冰)覆盖在星球的极地地区。

9·For example, during the last ice age, he said, what was happening in the oceans dramatically affected levels of atmospheric carbon dioxide, or CO2.

比如说，上个冰河时期地球海洋发生的一系列变化对大气中二氧化碳的含量产生了及其重大的影响。

10·Rising temperatures make carbon dioxide leak from the oceans for two main reasons. First, melting sea ice increases the rate that the ocean mixes, which dredges up CO2-rich deep ocean waters.

二氧化碳从海洋中泄露出来，原因有两点，一是冰层融化，导致海洋气体溶解速率增长。