英语词汇“niobium”的读音、翻译、释义、用法及例句-高考报名网

词汇	niobium
释义	niobium n.（名词 noun）【化】铌（金属元素,符号 Nb, 原子序数41,旧称 columbium）
随便看	public office public officer public opinion public orator public ownership public prosecutor public purse Public Record Office public relations public relations officer public room public sale public school public sector public servant public service public-service corporation public speaking public spirit public-spirited public television public transport Public Trustee Office public utility public works

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