This method not only considers the fuzziness of waterquality classification limit but also enhances the precision and the utilization ratio of information.
该方法不仅注意到水质分级界限的模糊性，而且信息利用率和精度均有较大幅度的提高。
2
The PAHs density is far higher than the limit of"environmental quality standard of surface water"which proves that PAHs pollution of the Meiliang bay source water is serious comparatively.
Due to the behindhand economic and natural limit, all the problems about water shortage, water quality safety and non-convenient transportation need be settled immediately.