“polishing compound”例句

单词 polishing compound 例句 DEFINITIVE EXAMPLES 权威例句〔bone ash〕The white, powdery calcium phosphate ash of burned bones, used as a fertilizer, in making ceramics, and in cleaning and polishing compounds.骨灰：焚烧骨头所得的白色粉末状磷酸钙。用作肥料...