Hours may change to support higher activity, such as during the Christmas season.

They get along well in homes with other animals, children, and high activity.

The track of the two components went from low to high activity around 1925.

The high activity will speed the end of the cycle.

These years were marked by especially high scientific activity of the chair.

Such high activity is also expected from African workers, sometimes creating tensions between groups.

"We want to be where the big growth and high activity will be."

We are now in the middle of a period of high activity.

This higher activity is what researchers believe to be the brain's "default system".

Many efforts have been made to deal with this to ensure high activity and long life of a catalyst.