求翻译：调查资料，氮磷浓度比远大于7，因此洞庭湖水体中磷是限制性营养盐。洞庭湖水体以中—富营养级为主。水体中氮磷浓度较高，具有富营养化的潜在能力，由于洞庭湖特殊的水沙条件，决定了富营养化的外在表现不明显，没有出现“水华”现象。是什么意思？

Survey data, nitrogen and phosphorus concentration is much larger than 7, so the Dongting Lake of phosphorus is the limiting nutrient salt. Dongting Lake water main in - eutrophic level. Higher N and P concentrations in water bodies, eutrophication potential of Dongting Lake water and sediment condi

Survey information, nitrogen phosphorus concentrations greater than 7, than the Dong Ting Lake phosphorus in the water body is restricted nutrient. Dongting lake waters - rich in nutrition level. In the water body nitrogen phosphorus concentration is high, with the eutrophication of the potential ca

Survey data, nitrogen and phosphorus concentration far greater than 7, therefore is a limiting nutrient of phosphorus in waters of Dongting Lake. Dongting Lake eutrophication in water-level. Higher concentrations of nitrogen and phosphorus in waters, eutrophication potential capacity, due to the spe