If you buy three you get one free.

如果你买三个，免费多送一个。

youdao

If you buy three, you get one free.

如果你买三个，免费多拿一个。

youdao

In the land of plenty, we are constantly tempted with more ways to spend: bigger servings, buy one get one free offers, and endless opportunities to get rich quick.

在富饶之地，有太多种不断引诱我们花销的方式：丰盛的餐饮、买一送一、无数的快速致富机会。

youdao

Graduate students who receive a grant get nine free credits to take courses.Undergraduates receive between one thousand and five thousand dollars in support.

VOA: special.2009.02.19

You should feel free to try to get one of those.

大家大可以光明正大地拿来用

耶鲁公开课 - 心理学导论课程节选

You can get one free credit report every year from each of the three credit bureaus.

FORBES: Protecting Yourself From Online Hackers

Hence, more promotions (such as Buy Two, Get One Free etc) can be expected on companies? e-commerce websites.

FORBES: Rise in Online Shopping Threatens Avon's Model

Cardholders get one free ATM withdrawal each time they receive a benefit payment.

WSJ: Government Pushes Paperless Payments for Social Security