所谓的“蜗牛邮件”就是传统的邮寄信件，没有邮递员也没有邮箱。

'Snail mail' is the traditional letter delivering service in which you have a postman and a post box.

youdao

所谓的“蜗牛邮件”就是传统的邮寄信件，没有邮递员也没有邮箱。

'Snail mail' is the traditional letter delivering service in which you have a postman and a post box.

youdao