noun🔗Share硬底，干湖床. A former lake, especially a lake that has dried and habitually remains dry, opposed to playas."The farmer's field was a hardpan, a dried-up lake bed that was now too hard to plow easily. "这块农田是一片硬底，原先是一个干涸的湖床，现在变得非常坚硬，难以耕犁。geologygeographyenvironmentChat with AIVocabulary GamePractice Reading
noun🔗Share硬盘层，坚硬土层。 A distinct layer of soil that is largely impervious to water."After a heavy rain, the water remained pooled on the surface because a layer of hardpan prevented it from soaking into the soil. "一场大雨过后，水仍然积在地面上，因为一层坚硬土层（硬盘层）阻止了水渗入土壤。geologyenvironmentagricultureChat with AIVocabulary GamePractice Reading
