Pop3
abbr. 邮局通讯协定第三版（Post Office Protocol 3）
🗣️ 情景例句
Could be.
也许。
I know the boy whose father is a mailman.
我知道那个男孩的父亲是邮差。
I'm sorry, but this week isn't very convenient for me.
对不起，这个星期我都不方便。