单词 | 象银 |
释义 | 〔niobium〕A silvery, soft, ductile metallic element that occurs chiefly in columbite-tantalite and is used in steel alloys, arc welding, and superconductivity research. Atomic number 41; atomic weight 92.906; melting point 2,468°C; boiling point 4,927°C; specific gravity 8.57; valence 2, 3, 5. See table at element 铌:一种象银的、柔软的、可延展的金属元素,主要存在于铌钽物中,用于钢铁合金、弧形焊接以及超导(电)性研究中。原子序数41;原子量92,906;熔点2,468°C;沸点4,927°C;比重8.57;化合价2,3,5 参见 element〔silvern〕Resembling silver; silvery.象银的;银铃般的〔silver〕Resembling silver, especially in having a lustrous shine; silvery.似银的:象银的,尤指有闪亮光泽这一点上;似银的 |
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