By the end of the next decade, general circulation models emerged globally as a central tool in climate research.

This was the central organizing tool that we're using.

Audience participation seems to have become a central tool for Mr. Gore.

It is a central tool in combinatorial and geometric group theory.

"Most schools do not have enough computers to make them a central tool of instruction."

Mr. Clinton campaigned on a promise to make such a tax benefit a central tool in his economic program.

The area theorem is a central tool in this context.

One central tool in complex analysis is the line integral.

It is a central tool in model theory, providing a fundamental method for constructing models.

Card games use a deck of cards as their central tool.