词汇 | didymium |
释义 | didymium /daɪ`dɪmɪәm/ n. A substance, formerly supposed to be an element of the rare earth group, now known to be a combination of neodymium and praseodymium. 【化】从前疑是稀有金属原素之一,现已知为钕(Nd)与镨(Pr)的混合体(符号Di)。 |
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