mail boat

1. Ordinary mail to China goes by boat and the sailings are irregular.
   到中国去的平信要靠船运。而船的航班是不定期的。
2. You're going home with the next mail boat.
   你乘下一艘邮船回家吧。
3. He gets the mail from the boat and delivers it to all the houses on the island.
   他从船上取得信件并将它们送给岛上的每一家。

noun

1. a boat for carrying mail

   Synonym:    mailboatpacketpacket boat