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
And thanks for the advice about the house.
也谢谢你关于房子的建议。
Friends (the best of friends) must part.
好友终有分手时。
Is there any sugar in the bottle?
瓶子里还有糖吗？