So an unusual element became part of the high school curriculum: the Lawrence plane pause.

That's true, and it's another unusual element, given the conventions of the day.

All of these unusual elements combined to create a musical experience unlike anything the Monterey audience had ever seen.

Increasing the fare - never a simple political decision - is complicated this year by three unusual elements.

Some hooks become popular without using any unusual elements.

But another unusual element of the design was approved.

The birth of each of the children carried an unusual element.

It seems unlikely anyone will notice, but the most unusual element is missing.

Nevertheless, it seemed certain that some unusual element was present in the chain of purple crimes.

Found objects are sometimes used in music, often to add unusual percussive elements to a work.