This system of checks and balances, which functioned well for some 70 years, must contain elements that may be usefully applied today.

(This suggestion could be usefully applied to so-called positive advertising, too, which is often positively misleading.)

The principle had been discovered; but many, many years were to elapse before that principle was usefully applied.

In some cases, this can be usefully applied, for example in combination with Pontryagin duality.

CAN the ecosystem concept be usefully applied in situations where human activity is dominant?

Although this framework has been usefully applied to higher education (see Wright 1988), its main impact has been on studies of the school curriculum.

Could it be usefully applied without derangements of greater magnitude than the benefits it would produce?

But I'm prepared to believe that a competent mogul might actually know some things that could be usefully applied to overseeing a piece of government.

The Dukakis administration insists that the law could be usefully applied in less prosperous states.

It could be usefully applied across large samples of readers to discover normative patterns in perceived co-operation.