| 释义 |
DEFINITIVE EXAMPLES 权威例句〔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〔terbium metal〕Any of several rare-earth metals separable from other metals as a group and including europium, terbium, and gadolinium.铽金属：能够同其它金属元素分开的几种稀土元素的任何一种或几种，包括镝、铽和钆等美国传统 |