In the Bohai Bay, NP and OP concentrations were far lower than those in Haihe River; but the dilution of sea water was not the only cause of its concentration lowering.
渤海湾中np和OP的浓度要远远低于海河，但是海水稀释不是造成其浓度降低的唯一原因。
In the Bohai Bay, NP and OP concentrations were far lower than those in Haihe River; but the dilution of sea water was not the only cause of its concentration lowering.
渤海湾中np和OP的浓度要远远低于海河，但是海水稀释不是造成其浓度降低的唯一原因。
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