The sacks are full of cobalt ore.

袋子里装满了钴矿。

We arrive at the Musonoi river mine where the cobalt ore is washed to grind it down.

我们到达了Musonoi河矿，那里的钴矿被洗去磨碎。

Same with cobalt -- if you need one tonne of battery-grade cobalt, you have to mine 300 tonnes of cobalt ore.

钴也是如此，如果需要一吨电池级钴，就必须开采 300 吨钴矿石。