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单词 lead powder
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原声例句
科学杂志:地质学

The lead powder that settled after the fire is toxic to humans, making researchers take careful precautions when working in the cathedral.

火灾后沉淀的铅粉对人体有毒,因此研究人员在大教堂工作时要小心谨慎。

VOA慢速英语_科技

Leonardo is thought to have melted lead oxide powder, which has an orange color, in linseed or walnut oil to make it thicker and dry faster.

人们认为,莱昂纳多在亚麻籽或核桃油中熔化了橙色的氧化铅粉,以使其变得更稠,干燥更快。

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