"I'm sure that no introductions are necessary between the two of you."

But an opinion of a second doctor is necessary between weeks 12 and 20.

I have trouble getting the power down, which is necessary between the slow corners.

We didn't speak often, since words aren't really necessary between twins.

In such cases a compromise is necessary between viewing comfort and the avoidance of window violations.

Not many words were necessary between the only two living Masters of Sinanju.

A perfect synchronisation is necessary between those channels to manage the feeds.

Communications were, of course, not only necessary on the battlefield, but between battles as well.

But results early this morning mean that a runoff will be necessary between the two top finishers.

Often several iterations are necessary between the disciplines in order to find the values of the objectives and constraints.