A grim, sour scent flashed from him despite the smile, and was gone.

The air was heavy with the sour scent of gasoline.

With every breath I seemed to take in more of that sour scent.

It was a silent room, filled with the sour scent of chemicals.

It is likely that the unpleasant sour scent of leaves when crushed may be due to these two acids.

A sour scent began to fill the air; even the cat's-paws couldn't clear it.

Beneath them a shallow breath whistled, giving a strange sour scent.

They added a wet, sour scent to the close air of the tent.

He smelled the sour scent of death even in the cold night.

The woods lay silent all about them, breathing their sour urgent scent of green.