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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
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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