The vacuum has an unpleasant smell.

这个真空吸尘器有股难闻的气味。

《柯林斯英汉双解大词典》

We deep fried fish three days ago in the kitchen, but the unpleasant smell stays.

我们三天前在厨房里炸过鱼，那股难闻的味道一直没散。

youdao

As days passed, and the children started to complain because of the unpleasant smell let by the rotten potatoes.

几天过去了，孩子们开始抱怨，因为腐烂的土豆散发出难闻的气味。

youdao

Some have an unpleasant smell.

VOA: special.2010.04.06

The unpleasant smell of fermenting corn hangs in the air around Archer-Daniels-Midlands massive Decatur headquarters.

FORBES: Vindication

Officials also said water coming out of a tap in one room was too hot and the home had an "unpleasant smell".

BBC: 'Serious risk' found at Ashcroft Care Home

Traders in the resort said the unpleasant smell was hurting trade.

BBC: Ingoldmells ride