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单词 橄榄石
释义 DEFINITIVE EXAMPLES 权威例句〔basalt〕A hard, dense, dark volcanic rock composed chiefly of plagioclase, pyroxene, and olivine, and often having a glassy appearance.玄武岩:一种硬的、致密的、黑色的火山岩。它主要由斜长石、辉石和橄榄石组成,外表经常很光滑美国传统〔dunite〕A dense igneous rock that consists mainly of olivine and is a source of magnesium.纯橄榄岩:一种密度大的大成岩,主要由橄榄石组成,是镁的一种来源美国传统〔peridotite〕Any of a group of igneous rocks composed mainly of olivine and various pyroxenes and having a granitelike texture.橄榄岩:含有大量橄榄石和各种辉石并有花岗岩状质地的岩石美国传统〔peridot〕A yellowish-green variety of olivine used as a gem.贵橄榄石:一种黄绿色橄榄石,被用做宝石美国传统
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