而在污水回用的多种形式中，地下回灌是既有效又经济的回用方式。

Among the sewage reusing ways, groundwater recharge is not only available but economical as well.

youdao

而在污水回用的多种形式中，地下回灌是既有效又经济的回用方式。

Among the sewage reusing ways, groundwater recharge is not only available but economical as well.

youdao