Guò / le / bǎo / zhì / qī / de / shí / pǐn / tōng / cháng / huì / zhé / bàn / chū / shòu / dàn / wǒ / hái / shì / bù / jiàn / yì / gòu / mǎi。

过了保质期的食品通常会折半出售，但我还是不建议购买。

Food past its expiration date is usually sold at half price, but I still do not recommend buying it.