Certificate of validity
[法] 有效证明书
🧩 词语组成解析
certificate
[sɚ'tɪfɪkət]
n. 证明书;文凭，结业证书;
vt. 发给证明书;用证书证明（或认可）;
cert 搞清 + ifi=fy表动词 + cate表名词 → certify搞清楚=证明+ cate表名词 → 证件
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
I want to send this letter to China, by air mail.
我想把这封信航空邮到中国。
Whom will you write to?
你将写信给谁？
It's quite likely that a decision will be made before the end of the year.
有可能年底前就要作出决定。