This primitive form of placer mining is still used in some places for panning gold.

这种原始的砂矿开采形式至今还在一些地方用来淘金。

youdao

This primitive form of placer mining is still used in some places for panning gold.

这种原始的砂矿开采形式至今还在一些地方用来淘金。

youdao