Yet the physical basis and mechanisms of the mind remain inside the head.

The mechanism of maspin function remains to be fully understood.

Nature tends to evolve mechanisms to remain in balance.

The mechanism causing these cyclic temperature changes remains at the heart of the 100,000-year problem.

However, the mechanism of endocycle control in plants remains poorly understood.

The mechanism underlying their origin, however, remains poorly understood.

The exact mechanism behind this systemic effect remains to be elucidated.

The basic mechanism of the Zippo lighter has remained unchanged.

All pre-existing administrative mechanisms, guidelines, and procedures for achieving information quality remain in place.

Although microtubules have been known to influence cell migration for many years, the mechanism by which they do so has remained controversial.