Maildrop
na. 邮筒；邮筒槽口；秘密通信地址\\n
🗣️ 情景例句
Let me know by the end of the week.
这个周末前给我回音。
No wonder you're so experienced.
怪不得你这么有经验。
Will you shut the door, please?
请你把门关上，好吗？