Meanwhile, the kids put down an ice rink in the freezer, and Linda takes charge of their undergroundice-wrestling league.
同时，孩子们放下一个溜冰场在冰箱里，琳达以其地下冰摔跤联盟负责。
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The terrain where Phoenix set its three legs is relatively flat with polygon-shaped patterns in the ground likely caused by the expansion and contraction of undergroundice.
The spacecraft will use its 2.5-meter robotic arm to scoop up soil samples and collect undergroundice, or permafrost, to see whether there's evidence life ever existed on the Red Planet.