It is important, therefore that the surface of the water be exposed to fresh air.

All you need do is expose the wine to air.

Then, when exposed to air, it would have yet another effect.

"I thought old wines turned to vinegar when they were exposed to air."

Sesame oil can go bad if it is exposed to air and sunlight.

The flesh of the stem is white, and does not change color when exposed to air.

Some of the mussels will be far up the beach, exposed to air for at least two or three hours a day.

It happens to metals when they are exposed to air or water for a long time.

Our water pollution situation gives off short bursts of light when exposed to air.

It had to be exposed to fresh air and allowed to heal.