mailshot

noun

1. 邮寄广告材料；广告邮件
   advertising or information that is sent to a large number of people at the same time by mail

1. （用作宣传或慈善募捐的）邮寄资料，邮寄广告材料
   A mailshot is a letter advertising something or appealing for money for a particular charity. Mailshots are sent out to a large number of people at once.

1. We're sending out a mailshot telling our customers about our new products.
   我们在向客户邮寄我们的新产品广告。