| 单词 | niobium |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔alnico〕Any of several hard, strong alloys of iron, aluminum, nickel, cobalt and sometimes copper, niobium, or tantalum, used to make strong permanent magnets.铝镍钴合金，磁钢：由几种硬的强金属，如铁与铝、镍、钴等合成，有时是铜、铌、钽合成，用来制作超硬度永磁合金美国传统〔columbium〕Niobium. No longer in scientific use.钶：铌的旧名，已被废弃美国传统〔samarskite〕A velvet-black mineral that is a complex mixture of several rare-earth metals with niobium and tantalum oxide.铌钇矿：一种鹅绒黑色矿物，是几种稀土金属与铌、钽氧化物的混合物美国传统 |
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