compacted to form permanent ice sheets several kilometers thick. 压缩成了几千米厚的永久性冰层
A bison's thick coat is such good insulation, 野牛厚厚的皮毛是出色的隔热材料
A thick layer of mud can't disguise this animal's scent. 厚厚的泥浆掩盖不住它的气味
A wall of ash and debris hundreds of kilometers thick... 一道粉尘和碎片组成的墙 厚达数百公里
A dense atmosphere, thick with water vapor, 大气密度很高 富含水汽