The evaluation results showed there existed serious pollution (water quality) and medium pollution (aquatic biology) in water environment of the wetlands respectively;
水质与水生生物评价结果表明，湿地水环境处于中、重度污染程度；
The generation of the pollutant in the hydraulic medium and its effect on the hydraulic system as well as the control of the medium pollution are detailed in the paper.
文章详细叙述了介质污染物的产生和对系统的影响，以及介质污染控制。
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。
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