如果你买三个，免费多送一个。

If you buy three you get one free.

youdao

youdao

另外，人们还会多买便宜的鸡肉、土豆和纯牛奶，少买较贵的牛肉、豌豆和花式酸奶混合物。

They will also buy cheap chicken rather than dear beef, potatoes rather than mangetout and plain milk rather than fancy yogurt concoctions.

youdao

If I buy this amount of two-period bonds, how much does it cost me?

如果我买这么多两年期债券,我要花多少钱呢

耶鲁公开课 - 金融市场课程节选

and I think it's worth it for the extra dollar or the extra fifty cents to buy the nicer brand.

我想，值得多花一美元或五十美分去买更好的品牌产品。

不需要名牌 - SpeakingMax英语口语达人

You can't fight as a hoplite, in other words, unless you can afford to pay for your equipment and that excludes a goodly number of citizens who are too poor to fight in the phalanx.

换句话说,你不能加入步兵方阵,除非你自己能出钱买装备,这样有相当多的公民,会因为贫穷无法在方阵中战斗

耶鲁公开课 - 古希腊历史简介课程节选