|zero in on +
||I think I have zeroed in on what has been
causing the problem.
|zip around +
||move quickly from place to place
||I zipped around town after work today.
||stop paying attention
||He zoned out during class.
||Jill was so exhausted after taking the
TOEFL test that she zonked out before dinner.
||You need a telephoto lens to zoom in.
|zoom in on +
||focus on something, pinpoint
||She zoomed in on his face while taking