1.   The camera tracks the movement of these materials, thus assisting in diagnosis of cancers or various types of cardiovascular disease.

2.   Fade to a suburban neighborhood, where the camera tracks through a sprawling, Prairie-style house and comes to rest in an upstairs bedroom.

3.   If someone coughs more loudly than the person talking, the camera tracks the louder noise and loses the speaker.

4.   Television cameras have tracked his every move for the past two weeks.

5.   The camera tracks across a field to where Cooder sits on a concrete abutment, which seems to be deteriorating before our eyes.

6.   The camera tracks Steve Nawojczyk, the Little Rock coroner, on his mission to persuade inner-city youths to put away their guns.

7.   Then the camera tracked Jason Wiles, an actor whose role is a patrol officer who responds to major disasters.

8.   Two cameras track his movements.

9.   Truffaut has let the camera track Doinel to the ocean.

10.   Cameras track her every move, friends spill their guts on television and self-annointed pundits weigh in on her fate.