mail bus

例句：

1. 1. The mail bus is a reliable way to deliver mail.
   邮件巴士是一种可靠的邮寄方式。
2. 2. The mail van was packed with packages for the upcoming holiday.
   邮件车厢里装满了即将到来的节日的包裹。
3. 3.The mail vehicle made its way through the city streets on its way to the post office.
   邮件车辆在前往邮局的路上穿行于城市街道。