广告邮件是一种廉价的广告媒体。的翻译：Advertising mail is a cheap form of advertising media. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Advertising mail is a cheap form of advertising media.

The advertisement mail is one kind of inexpensive advertisement media.

Advertising mail is an inexpensive advertising media.

Advertising mail is a cheap form of advertising media.