In order to make this possible a number of techniques were used.

Since then a number of other techniques have been described.

If the time in question is not known, a number of medical/scientific techniques are used to determine it.

A number of techniques have been developed to prevent such problems.

There are a number of techniques used in negative campaigning.

A number of techniques can be employed to make the experience more valuable.

There is less focus on learning a large number of techniques.

There are a number of techniques to make this practice more secure.

However, only a limited number of techniques are in common clinical use.

There are a number of other techniques you can use to gather information about your environmental performance.