英德
有道
百度
谷歌
图片
维基
百科
环形山 [huán xíng shān]
crater
- 研究者们长期以来都在争执月球表面是否有水——比如朦胧的环形山中冻结的水分。
Researchers have long argued over whether the moon contains water on its surface — frozen in shadowy craters, for instance. - 接近照片顶部尽头（即北部），冰雪变得较稀少，但是左上角一个巨大的撞击陨石坑壁却为环形山底的一块椭圆形积冰提供了庇护所。
Toward the top (northern) end of the image, the ice becomes sparser, but the walls of a large impact crater in the upper-left corner provide a refuge for an oblong ice deposit on the crater floor. - 2004年着陆于子午平原，机器人机遇号开始了它最长最危险的游历，目前它正意图在明年某个时候到达巨大的奋进环形山。
Landing in 2004 in Meridiani Planum, the robotic Opportunity has embarked on its longest and most dangerous trek yet, now aiming to reach large Endeavor Crater sometime next year.
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