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单词 富含硅
例句 DEFINITIVE EXAMPLES 权威例句〔sial〕Rock rich in silicon and aluminum forming the upper layer of the earth's crust beneath all continental landmasses.硅铝带,硅铝层:由富含硅和铝的岩石组成的所有大陆块下面的最外层地壳美国传统〔sima〕The lower layer of the earth's outer crust that underlies the sial and is rich in silica, iron, and magnesium.硅镁层:地球外壳的较低层,在硅铅层之下,富含硅、铁和镁美国传统
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