The first is hard and shiny; the other soft and dark and, although new, aging quickly.

The world's reactor fleet is aging quickly and not enough new units are coming online.

Once they have done so, their aging slows; if they then leave the valley, they age quickly and die.

Leo is on his feet, very tired, aging quickly.

Many of the structures, none of which rise much more than 10 stories, are aging quickly.

They know that with each downward step, time passes just a little bit faster and they age a little more quickly.

As he aged quickly, turning grey quite young, he moved into character roles.

If they leave the valley, they age quickly and die.

For reasons unclear, the wine seems to be aging rather too quickly.

Even if you could, I would age quickly and soon be useless to you.