酸臭

zhè niú nǎi yǐ jīng biàn suān le yǒu gǔ suān chòu de wèi dào

这牛奶已经变酸了，有股酸臭的味道。

This milk has gone sour and it has a sour and smelly taste.

wǒ mǎ shàng jiù wén dào le ǒu tù wù de suān chòu wèi

我马上就闻到了呕吐物的酸臭味。

The stink of vomit reached me instantly.