Baiyunebo Mine in Baotou City has a workable reserve of rare earth resources ranking in the first in the world,associated with 0.04% thorium and 0.001% uranium.是什么意思_Baiyunebo Mine in Baotou City has a workable reserve of rare earth resources ranking in the first in the world,associated with 0.04% thorium and 0.001% uranium.在线翻译_英语_读音_用法_例句