单词 | rare element |
例句 | DEFINITIVE EXAMPLES 权威例句〔pegmatite〕A coarse-grained granite, sometimes rich in rare elements such as uranium, tungsten, and tantalum.花岗伟晶岩:一种有时富含铀、钨和钽等稀有元素的粗纹理花岗岩美国传统 |
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