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
He worked his way through college.
他半工半读念完大学。
Here's my credit card, just bill me.
这是信用卡，请记账吧。
It was obvious that he was very embarrassed.
显然他感到很尴尬。