With the help of a geologist, he mined for salt and coal, water and mercury.

在一位地质学家的帮助下，他开采了盐，煤，水和汞矿。

youdao

With the help of a geologist, he mined for salt and coal, water and mercury.

在一位地质学家的帮助下，他开采了盐，煤，水和汞矿。

youdao