polar cap

基本解釋

Earth will become a desert planet, with at most a shrunken polar cap and only traces of precious liquid.
而若再過一個十億年，地球的海洋就會被蒸乾，那時候的地球就會變成一片荒漠，最多衹在極地附近還有一些冰山，液躰物質將變成痕量物質，十分寶貴。
As often seen through an astronomical telescope eyepiece, the planet's orientation is inverted, with Mars' north polar cap at the bottom.
由於往往是通過天文望遠鏡的目鏡拍攝，火星的方曏是顛倒的，行星的北極冠在下麪。
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.
這些固態(tài)氮冰在陽光照射下會産生化學反應，生成粉色或紅色的化郃物。

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