Certificate mail
挂号信
🧩 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
mail
[mel]
n. 邮件，邮政;邮政（制度）;邮务员，邮递员;〈古〉袋，旅行包;
vt. 邮寄;给…穿盔甲;
vi. 投邮;
🗣️ 情景例句
I know.
我知道。
This professor has put all of his students to sleep except two.
这位教授使得除了两人以外的所有学生都入睡了。
I don't know why he's in a tailor's shop. Just look at his clothes!
真不懂他为什么进服装店。瞧他这身打扮！