Letterbox
n. 邮筒, 邮箱, 投信口, 信箱
✅ 同义词
🗣️ 情景例句
No entry.
严禁入内。
Congratulations on your success in the election.
我恭喜你当选了。
He had been obliged to join the army during the Second World War.
年龄比他两个弟弟大很多，第二次世界大战期间被迫参军。