The vintage wine, once exposed to air, must be drunk fairly soon.

At least in this country, conditions so alien to freedom do not survive once exposed to the light of day.

Once exposed, any pro film should be taken to the processor post haste.

Once exposed to the air, the magical jewel began to give off a radiant light.

Once exposed to the sunlight of democratic debate, their problematic character becomes clear to all.

It is true that once exposed to the best, ear and mind are spoiled.

Once exposed to light, these inner branches will begin to grow.

Once exposed to them, they can see the magic of them.

Once exposed to the prions, you can't leave or you'll die.

Once exposed to a particular virus, the instructor had explained, you became immune to it.