Certified reference material
[化] 有证标准物质
🧩 词语组成解析
certified
[['sə:tifaid]]
a. 证明合格的\\n[化] 检定的; 证明的; 书面证明的
material
[mə'tɪrɪəl]
n. 材料，原料;素材;布，织物;适当人选;
adj. 物质的;肉体的;重要的，决定性的;辩证的，推论的;
🗣️ 情景例句
You've really been keeping an eye on quality.
你们的确在质量上下了功夫!
May I have him call you back?
要我请他回你电话吗？
We had better go back to the station now,Ken.
肯，我们现在最好回车站去。