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1·The electron density is much lower at night in the polar cap areas.

夜间进入极盖区后，电子密度则很低。

2·This year, Shanshan's dad was a pilot on flights over the Polar Cap.

今年，姗姗的爸爸成为了飞两极冰帽的航班上的飞行员。

3·Zuber and her colleagues also analyzed Mars's much larger northern polar cap.

尤伯和她的同事也分析了火星上要大得多的北部极地冰冠。

4·Every winter, Mars's polar cap is sheathed in a thin blanket of carbon dioxide.

每到冬季，火星的极冠被一层薄薄的二氧化碳覆盖。

5·This warm polar cap is believed to contain the highest temperatures on Saturn; the scientists did not give a temperature estimate.

尽管科学家并未做出具体的气温评测，但他们相信这处“温暖”极冠包含着土星上的最高气温。

6·As often seen through an astronomical telescope eyepiece, the planet's orientation is inverted, with Mars' north polar cap at the bottom.

由于往往是通过天文望远镜的目镜拍摄，火星的方向是颠倒的，行星的北极冠在下面。

7·Visible also in the above images are the north polar cap of Mars, dark and light soil, clouds, and, in the early images, a global dust storm.

上面的影像中也可以看到火星的北极冰帽，亮暗不同的土壤，云层，以及早期影像中的沙暴。

8·The pinkish deposits constitute a vast south polar cap believed to contain methane ice, which would have reacted under sunlight to form pink or red compounds.

这些固态氮冰在阳光照射下会产生化学反应，生成粉色或红色的化合物。

9·He said that further warming could trigger polar ice cap melting.

他说进一步的变暖可能触发极地冰帽融化。

10·The retreat of the polar ice cap is making the region easier to work in, and there is thought to be lots of oil and gas to tap.

北极冰盖的消融使得在该地区作业较为容易，而且该地区储藏有大量可开发的石油和天然气。