The polar ice caps are the giant thick sheets of ice that cover the North and South poles.

极地冰盖是覆盖北极和南极的巨大的厚厚冰层。

Because of the thick sheets of ice covering the continent, Antarctica has the highest average elevation of any continent in the world.

由于这些厚厚的冰层覆盖了这片大陆，相对于世界上任何大陆，南极洲的平均海拔是最高的。

All that remains of them to tell their history is a series of interrupted fragments of channels, mostly choked with gravel, and buried beneath broad, thick sheets of lava.

剩下来讲述历史的只有一系列断断续续的河道碎片， 大部分被砾石堵塞， 并埋在宽阔厚实的熔岩层下。

So, we took what was considered the simplest Kirigami model, and scaled it down to a one atom thick sheet of graphene, and created an incredibly tiny, incredibly resilient spring.

所以，我们采用了被认为是最简单的 Kirigami 模型，并将其缩小到一个原子厚的石墨烯片，并创造了一个非常小、非常有弹性的弹簧。

The team has suggested that a polar station should first be installed on the ice above the lake, enabling researchers to plan for ways to drill into the thick sheet to retrieve the sediment.

该团队建议首先在湖上方的冰上安装一个极地站，使研究人员能够规划钻入厚冰层以取回沉积物的方法。