The US could break its dependence on China for many critical minerals if metals found in the waste from existing American mines were used rather than discarded, new research has found.
新研究发现,如果将现有美国矿山产生的废料中所含金属加以利用,而非弃置,美国就有可能摆脱对manbetx3.0 在多种关键矿物上的依赖。
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