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The moon was once thought to be dry . Then came hints of ice in the polar craters .

月球曾被认为很干燥，而后又有迹象显示在极地的月坑有冰。

One concerned a 20-year-old hypothesis , supported by radar observations from earth , that suggested some polar craters might hide reserves of water-ice .

其中一个假说存在了20年的，这个假说认为一些极地的火山口处有刨冰存在，这个假说已通过地面雷达观测证实了。

The deposits in the lunar craters may be as informative about the moon as ice cores from earth 's polar regions are about the planet 's past climates .

在月坑里的沉积物可能含有与月球相关的丰富信息，就像地球极地的冰芯那样，含有许多过去气候的信息。

Between now and early september , when the polar pack ice shrivels to its summer minimum , they will pore over the daily sea ice reports of america 's national snow and ice data centre .

从现在到九月初，极地的积冰逐渐缩减到夏季最小量，这都会在美国国家冰雪数据中心的海冰报告里得到关注。

The result , according to a modeling study published earlier this month the journal of geophysical research , is a strong high-pressure system over the newly exposed sea which brings cold polar air , swirling counter-clockwise , into europe .

根据这个月初在《地球物理学杂志》上发表的一项模拟研究，这将在刚冰层融合的海面上形成一个高压系统，正是这个刚形成的海面把极地的冷空气，顺时针漩涡方向带到了欧洲。