Conventional biochemical treatment has reached its technical limit and is hard to improve its treatment effectiveness.

传统的化学法和生化法几乎达到技术极限，处理效果很难提高。

youdao

Conventional biochemical treatment has reached its technical limit and is hard to improve its treatment effectiveness.

传统的化学法和生化法几乎达到技术极限，处理效果很难提高。

youdao