Certification of product
[化] 产品证明书
🧩 词语组成解析
certification
[ˌsə:tifi'keiʃən]
n. 证明，鉴定，证书;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
She suffered terribly when her son was killed.
儿子被杀，她痛苦至极。
The wife is the key of the house.
妻子是一家的钥匙。
What colour is it?
是什么颜色的？