土壤分很多種，隻有致密的粘土層是不透水的。自然界中淺層地表的大片粘土層，非常少見。加沙臨近海邊，最有可能是透水極佳的沙土

來源: easycity 於 2023-10-21 12:12:54 [舊帖] [給我悄悄話] 本文已被閱讀：次

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