水陆路信件

例句：

1. 1. The post office has a large collection of waterborne mail.
   邮局有大量的水上邮件。
2. 2. The letter arrived by landmail, which was much faster than the usual mail service.
   这封信通过陆地邮件到达，比通常的邮递服务要快得多。
3. 3. The sender requested that the letter be sent by waterborne mail to ensure it arrives quickly.
   发件人要求通过水上邮件发送这封信，以确保它能够迅速到达。