mailboat
/ˈmeɪlbəʊt/ 11a ship or boat that carries mail.
noun [专属名词]（装运邮件的）邮船
The mailboat arrived on Friday mornings unless bad weather intervened. 除非受到恶劣天气的干扰，邮船于星期五上午到达。
单词造句:
The mailboat arrived on Friday mornings unless bad weather intervened. 除非受到恶劣天气的干扰，邮船于星期五上午到达。