"euxenite:a lustrous, blackish-brown rare-earth mineral consisting primarily of cerium , erbium, titanium, uranium, and yttrium."
"黑矿:一种光亮的棕黑色土矿石,主要由铈、铒、钛、构成."
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This is designated Ytterby Mine, a historical landmark for the discovery of four periodic elements: yttrium, terbium, erbium, and ytterbium.
命名为 Ytterby 矿,它是发现四周期性元素:钇、铽、铒和史里程碑。
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