不可数名词:
(symb Si) 硅
英语解释
a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
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本文概览:不可数名词:(symb Si) 硅英语解释a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's cr