Arsenic is an element that can be released into groundwater by soil and rocks.
Arsenic is an element that can be released into groundwater by soil and rocks.
砷是一种元素，它可以从土壤和岩石中地入地下水中。
Arsenic is an element that can be released into groundwater by soil and rocks.
砷是一种元素，它可以从土壤和岩石中地入地下水中。