召回类邮件的英文：
Call-Back Mail
v. 把...叫做；认为...是；打电话叫；大声呼叫；召唤；打电话；访问
n. 打电话；通话；短暂拜访；请求；呼吁；召唤；呼唤
- call upon; call on
应用;访问;号召;呼吁 - This is called wow.
这叫作“音幅失真”。 - It was called the Restoration.
这就是所谓的王政复辟。
n. 后面，背面，反面；背，背部；靠背；后卫
v. 支持；后退，倒退；背书；下赌注于
adj. 背部的；后面的；过去的；拖欠的.
adv. 以前；向后地；来回地；上溯
- Stand back to back!
背靠背站好！ - They are on the back of the menu.
它们在菜单背面。 - Our seats on the train were back to back.
我们在火车上的坐位是背靠背的。
n. 邮政，邮递；邮件；盔甲
v. 邮寄；给…穿盔甲
- Send the memo by express mail.
把这份备忘录用快递寄出。 - mail and luggage van
邮政行李车 - This parcel came in the mail today.
这个包裹是今天邮来的。