The zone in a lake or pond between the LITTORAL and PROFUNDAL zones, extending from the edge of the area occupied by rooted plants to a depth of about six to ten meters, where the water temperature declines.是什么意思_The zone in a lake or pond between the LITTORAL and PROFUNDAL zones, extending from the edge of the area occupied by rooted plants to a depth of about six to ten meters, where the water temperature declines.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句