Nicklen说，如果冰线继续消退的话，在50年到100年内，北极熊就会面临灭绝。
Nicklen said that polar bears could face extinction within 50 to 100 years if ice continues to recede.
另外一个有冰存在的迹象就是陨石坑底部的并行线和无核物质。
Another sign of ice is the presence of parallel lines and pitted material on the crater floor.
冰被模制得非常细致并且是半透明的，背景中的地平线[显得]抽象而平静。
The ice is molded in great detail and translucent, the horizon in the background abstract and serene.
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