And if that happens for a sustained period, the differences can become substantial.

Many went through a sustained period of grief immediately after the death.

So far as is known, only once did they share authorship over a sustained period.

Having been established since the early 1950s it is only over the last several years that they have finally enjoyed a sustained period of success.

Only growth over a sustained period of time will be able to achieve that.

"The price can probably stay above $25 for a sustained period."

He died on July 15, 1953, after to a sustained period of illness.

This often occurs repeatedly over a sustained period of time.

It may take a sustained period of rising prices to change that.

The problem lies in looking at the figures for any sustained period of time.