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crater wall 火山口壁。

crater-kin

There , sunlight is blocked by the 300 - meter tall crater wall from vaporizing the water - ice on the crater floor into the thin martian atmosphere 在那里,陽光被300公尺高的隕坑邊墻所擋住,以免陽光使這塊在隕石坑底的水冰蒸發到火星稀薄的大氣之中。

Frost can be seen around the inner edge on the upper right part of the crater , while part of the lower left crater wall is bathed in sunlight 在右上角的隕坑內緣還可以看到霜,但左下角部分的隕坑邊墻則是沐浴在陽光下。

Above the crater wall , far in the distance , lays a relatively featurelessmartian horizon 在隕石坑巖壁上方遠處,就是相對比較平坦的火星地平線。