compacted to form permanent ice sheets several kilometers thick. 压缩成了几千米厚的永久性冰层
Apparently they're attracted to the dryer sheets, and they're going in fine, 显然它们很喜欢烘干纸,它们进去的时候还算正常,(dryer sheets:是在使用衣服干燥机时用的烘干纸,(与湿的衣服一起放在干燥机内运行),目的是减少静电,增加衣服的柔软度,和添加香味。)
change his sheets and blankets daily 每天换洗床单和毛毯