“湖底的”用英语怎么说

赫布根湖底的基岩发生了翘曲和旋转, 引起湖中浪涌.Bedrock beneath Hebgen Lake warped and rotated, causing a seiche in the lake.湖底的水仍保持4℃, 直到几乎整个湖水冻成冰为止.The water at the bottom remains at 4℃, until nearly the entire body is frozen.叶子似乎被保留在湖底的沉积物里...