They normally come in pairs but may be used individually.

In addition both characters have some abilities that they can individually use.

The two components may be formed into a complex number or used individually.

Both can be used individually to date how long the material has been exposed at the surface.

Each function is presented and used individually in several different situations to create short, personal conversations between the students.

The Society said that the reforms could be used either together or individually (as a step-by-step change).

The two methods can be used simultaneously or individually.

It has never been said to be used individually; for example, using just the Hold of Ice, etc.

Used individually, the buttons raise or lower the volume.

In printmaking, they were used individually, to make the ink smooth and applying it.