Send ordinary letters into a roadside mailbox. Someone will take it out.

寄普通信只要投到路边的信筒里就好了，会有人去取的。

youdao

Do I hand the letters back to you, or put them in the mailbox outside?

我要把这两封信交还给您，还是把它们投进外面的邮箱？

youdao

Do I hand the letters back to you, or put them in the mailbox outside?

我要把这两封信交还给您，还是把它们投进外面的邮箱？

youdao