開采成本應該不是問題。據說西方所以從中國進口稀土，因為西方不願意自己提煉，提煉過程環境汙染嚴重。

來源: 無形劍於 2023-01-13 05:58:00 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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