Because the removal efficiency of COD in RBC is well, so in the effluent the NO3-3~-N concentration is high, but COD is low.

这是因为，生物转盘的有机物去除效果很好，出水中硝氮浓度较高而碳源含量很低。

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These results showed that the formation of diatom resting spores was related not only with N concentration, but also with Si concentration.

这说明硅藻休眠孢子的形成不仅受氮浓度的影响， 还与硅浓度有关。

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The percentage increase of blade NRA after cultivated by extra-source nitrate was positively related to the petiole nitrate-N concentration.

加入外源硝态氮培养后叶片硝酸还原酶活性的增加程度与叶柄硝态氮含量相一致。

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Some recent studies have revealed a significant concentration of particles in near-surface waters in areas of mid-ocean accumulation (N Pacific and NW Atlantic gyres).

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