问题描述：
英语翻译
In the first place sustainability here means to regain a good water quality which would be necessary to resettle the micro- and macrobenthos as well as plant communities in and outside the water body which are typi- cal for unpolluted rivers in this area.
In the first place sustainability here means to regain a good water quality which would be necessary to resettle the micro- and macrobenthos as well as plant communities in and outside the water body which are typi- cal for unpolluted rivers in this area.
问题解答：
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