Microwave energy and heat can be used separately or together.

It therefore can be used separately as a day activity zone.

All of these parts could be used separately or together for well controlled sound limiting.

They can develop a program for just one person or for many people to use separately.

This combination has shown a benefit over either medicine used separately.

There is a shared swimming pool used separately by boys and girls.

The associated device and/or motto can also be used separately.

A single ticket booth in the center of the building used to serve both the white and black waiting rooms separately.

The mechanical and natural components may be used in conjunction with each other or separately at different times of day.

They were designed so that they could also be used separately, each having a full set of controls.