It can also help to purify the waterquality, reduce pollution and improve environment.
荷花还可净化水质、减少污染、改善环境。
2
Other inputs and fish density are also carefully limited to avoid compromising waterquality or degrading the environment.
其他投入或鱼的密度也要小心严格的限制，以避免破坏水质或者污染环境。
3
The Nanning Urban Environment Project will assist Nanning Municipality in Guangxi Zhuang Autonomous Region to stop the deterioration of surface waterquality in selected urban centers.