letterbox
近义词：mailbox，mailbox，callbox，POB，postbox，POBox，
英英释义
Noun
- a numbered compartment in a post office where mail is put to be called for
- public box for deposit of mail
- a private box for delivery of mail
例句
用作名词(n.)
- I dropped the letter into the mail-box.我将信投入信箱。
- The box was crammed into letters.信箱里塞满了信。