Check them frequently and remove any that show signs of decay.

Harry nodded but to him they were only one more sign of decay.

She noticed Richard looking around him, studying the building for signs of decay.

There were no signs of decay in even the oldest.

It was a new building, already showing signs of decay.

But the hand had not shown any sign of decay.

But the culture was stable and showed no signs of decay.

"Everything else that falls off the body is a sign of decay."

Its bones showed clearly under the skin, yet with no sign of age or decay.

The time is 1970, and signs of decay are everywhere.