assay
/əˈseɪ; ə`se/ n
testing of esp metals for quality 试验, 测定, 鉴定（尤指对金属质量）
make an assay of an ore 对一矿石作试验鉴定. assay, v
1 [Tn] test the quality of (a metal); analyse (eg an ore) 测定（金属）的质量; 分析（如矿石）.
2 [Tn, Tt] (arch 古) attempt (esp sth difficult) 尝试（尤指困难事物）.