买一送一英语怎么说

买一送一英语怎么说：buy one get one free

例句：

• We have a special offer today - buy one get one free on all shirts!
• The supermarket is having a buy one get one free promotion on selected items.
• If you buy a movie ticket, you can get another one for free - it's a buy one get one free deal!
buy one get one freepromotiondiscountofferspecial deal
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