Objective To learn the relationship between snail spreading and water level in man-made irrigation area.

目的了解人工灌区钉螺扩散与水位之间关系。

youdao

Objective To learn the relationship between snail spreading and water level in man-made irrigation area.

目的了解人工灌区钉螺扩散与水位之间关系。

youdao