The results can happen for a certain period of time, but then it quickly becomes about, where do you want to be at your best?

You can only be useful at a job like this for a certain period of time.

His film and political career both failed for a certain period.

"You will understand that a certain waiting period is now in order," the old man said.

The participants also agree not to go to court for a certain period of time while the alternative process is under way.

After a certain period of time, the true character shows through.

A. Yes, for a certain period of time he did.

"All the members are supposed to take it over a certain period of time."

During certain periods, the working groups met every day for a number of hours.

If a father did not act within a certain period, he would have no more claim to the child.