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
To help scrub the building interior clean.
帮忙把建筑的内部擦洗干 。
It is my pleasure to introduce the keynote speaker for today.
我很荣幸地介绍今天的主讲人。
Use this treatment twice a day for a week. And another thing, at the end of the week, throw the frozen peas away. They won't be fit to eat.
一天治疗两次，一周为一个疗程。还有，一周以后要把冻豌豆扔掉。它们不能吃。