省内入湖四水泥沙含量低，洲滩优势植被为莎草、柳林，家畜活动数量多，感染螺密度高。

Many domestic animals are herded there and the density of infected snails is high.

youdao

省内入湖四水泥沙含量低，洲滩优势植被为莎草、柳林，家畜活动数量多，感染螺密度高。

Many domestic animals are herded there and the density of infected snails is high.

youdao