以下为句子列表：
英文: The effects of submerged plant on the concentrations of different nitrogen species in overlying water, porewater and sediment of different layers from water-sediment interface were investigated in simulating condition.
中文: 摘要在室内模拟条件下研究沉水植物对水－沉积物界面的上覆水、不同层次的间隙水和沉积物中不同形态氮含量的影响。
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英文: The rank order of the concentrations of different nitrogen species of porewater in different layers from different treatments was the lower layer>the medium layer>the top layer, but the concentrations of ammonia and nitrate of sediment were disciplinary.
中文: 不同处理不同层次的间隙水中，各形态氮含量均为下层＞中层＞上层，但沉积物中氨氮和硝态氮含量变化规律不明显。
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英文: The results indicated that on average the rank order of the concentrations of different nitrogen species in overlying water and porewater was organic nitrogen>ammonia>nitrate; the main form of inorganic nitrogen in sediments was of ammonia, and the submer
中文: 结果表明：总体上，上覆水和间隙水中不同形态氮含量的顺序为有机氮＞氨氮＞硝态氮；沉积物中可交换态无机氮以氨氮为主，沉水植物的存在并没有改变这一格局。
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