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来源：雅诚德英语网
The pollution state of NP and OP in this area was serious relatively, compared with Peal River delta; and medium or lower level compared with the similar areas abroad.
与珠江三角洲相比，该地区NP和OP污染情况较为严重，与国外其他类似区域相比则处于中等或较低水平。