You acted with the speed required to save a life.

Getting a place, he says, required almost impossible speed to beat out the competition.

What he had in mind would require speed and stealth.

However, there is a danger inherent in the very speed required.

It would require speed, and she'd have to be accurate or he'd kill her.

This type engine requires very high initial speed in order to work.

Two of the three events require speed, skill and talent.

Of course, the speed required would depend on your latitude as well.

First-copy speed The amount of time required to make the first copy.

The motor can also be run up to the high speeds required for the spin cycle.