去年11月，研究小组发现的撞击所产生的至少26加仑的水，撞击出的陨石坑充分证明了含冰的说法。

Last November, the team reported that the impact had kicked up at least 26 gallons of water, confirming suspicions of ice in the craters.

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研究人员通过观测被称为泥炭丘的小丘来测量永冻带边界北退的程度，泥炭丘是在北部泥炭沼泽含冰的土壤上自然形成的。

The researchers measured the retreat of the permafrost border byobserving hummocks known as "palsas, " which form naturally over icecontained in the soil of northern peat bogs.

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在陨石坑口壁上也发现了并行线一样的裂缝，这可能是由于含冰物质热收缩现象造成的。

Parallel linear cracks are also observed along the crater wall over the gullies, which could be due to thermal contraction of ice-rich material.

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