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单词 base element
例句 DEFINITIVE EXAMPLES 权威例句〔cupel〕A porous cup, often made of bone ash, used in assaying to separate precious metals from base elements such as lead.灰皿:一种多孔杯,通常用骨类制成,在检验中把贵重金属从低劣物质如铝中分离出来美国传统
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更新时间:2024/11/11 12:42:54