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
Thanks, Robbie.
谢谢，Robbie。
Generally speaking, a contract cannot be changed after it has been signed by both parties.
一般来讲，合同一经双方签订就不得更改。
It's too far. The smaller one is nearer, and we've never been there before.
那个太远。小一点的那个近些，我们以前还从未去过那儿呢！