单词polar cap
na.: 【天】极冠
网络: 极帽；极卡；极冰帽
【天文学】极冠
极帽
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。
Melt-Proof The south polar cap is mostly frozen carbon dioxide, which shrinks during the summer but never disappears.
南极盖上有很多冻结的碳氧化合物，这些东西在夏天会收缩，但从来没有消失过。
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。
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。
An inexplicable new broad region of auroral light has been photographed at Saturn"s polar cap.
一种无法解释的大范围新型极光出现在土星的极盖地区，被摄像机拍摄下来。
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。
The disappearance of polar cap will greatly affect polar bears and other halobios .
冰帽的融化会给北极熊等海洋生物造成严峻后果。
At night the electron density is very low when the station situates at the polar cap area.
夜间进入极差区后，电子密度则很低。
Ionospheric patch formation: Direct measurements of the origin of a polar cap patch
电离层小块结构：一个极冠小块起源的直接测量
Are we about to get an ice-free Arctic? Disturbing pictures by NASA show the polar cap is shrinking in mass by around 15% per decade
我们是不是将看到一个无冰的北极呢？从NASA发布的烦人图片上看，极地冰盖正以每十年缩小约15%的速度锐减