Fears about Chinese supplies of vital rare earth elements have sent the shares of small mining companies soaring, a surge that executives and analysts warn is turning into a bubble.
對于中國關鍵稀土元素供應的擔心,推動小型礦業公司股價飆升,業內高管和分析師稱,這種飆升正演變為一個泡沫。
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