开采花费低廉，主要成本在于从矿到市场的运费。

It does not cost much to scrape it up; the expense comes in moving it from mine to market.

youdao

开采花费低廉，主要成本在于从矿到市场的运费。

It does not cost much to scrape it up; the expense comes in moving it from mine to market.

youdao