the rare-earth elements with atomic numbers 57 through 71; having properties similar to lanthanum
例句与用法
1.
Rare earth elements ( rees ) consist of lanthanide series with atomic numbers from 57 to 71 , as well as scandium ( atomic number 21 ) and yttrium ( atomic number 39 ) 稀土是指原子序数从57到71的镧系元素以及与其同族的钪和钇，共有17个元素。
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