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
When I first graduated from college.
那时我刚从大学毕业。
Pigs may fly,but they are very unlikely birds.
猪儿纵会飞，终究不是鸟。
Such is human nature, that a great many people are often willing to sacrifice higher pay for the privilege of becoming white-collar workers.
许多人常常情愿放弃较高的薪水以换取做白领工人的殊荣，此乃人之常情。