河流健康的等级分为五等：很健康、健康、亚健康、疾病、严重疾病。

The River health levels are divided into five: very healthy, health, sub-health, disease, serious illness.

youdao

河流健康的等级分为五等：很健康、健康、亚健康、疾病、严重疾病。

The River health levels are divided into five: very healthy, health, sub-health, disease, serious illness.

youdao