1. You can prepare and sort standard presort mail letter or flat categories, First-class presort mail, bar-coded items, or periodical presort mail letteror flat categories.
你能够准备和整理标准的预分类预排序邮件信或者沉闷的分类，第一课预分类预排序邮件，bar-coded 条款或者定期的预分类预排序邮件信或者沉闷的分类。
2. Well, we send all the first-class mail by plane to the East Coast, so you don't need an airmail stamp.
是这样，我们寄到东海岸的一级邮件全部用飞机传递，所以你不需要贴航空邮票。
3. The US Postal Service on Wednesday said it was ending first-class mail deliveries on Saturdays.
美国邮政周三宣布将停止周六的投递服务。