chāo shì lǐ cháng jiàn dì èr jiàn bā zhé mǎi èr sòng yī huì yuán zhuān xiǎng

超市里常见“第二件八折”“买二送一”“会员专享”。

In supermarkets, common promotions include '20% off the second item', 'buy two get one free', and 'member exclusive'.