柯林斯词典assay /əˈseɪ/ (assays) 1. N-COUNT An assay is a test of a substance to find out what chemicals it contains. It is usually carried out to find out how pure a substance is. 化验; 测定[技术] 返回 assay剑桥词典to perform an examination on a chemical in order to test how pure it is 鉴定，化验，分析（化学物质的纯度） 返回 assay