Screen colors change unexpectedly, programs shut down without warning, and machines crash.

Please be aware that both the legislative and the Congresswoman's calendars can change unexpectedly.

When you have diabetes, stress can cause your blood glucose levels to change rapidly and unexpectedly.

However, Fengshen unexpectedly changed course later that day, placing the ferry in serious danger of being overwhelmed by the storm.

She hit the lead freighter in the left hand column twice but missed her target on the right because it unexpectedly changed course.

But this week all that changed unexpectedly.

But since the Soviet Union unexpectedly changed its position, chances are starting to improve for making it work.

Things can change unexpectedly and futures quickly become less certain.

We may say that when a piece of music unexpectedly changes to a minor key this expresses a feeling of foreboding.

Please be aware that both the legislative calendar and the Congressman's schedule can change unexpectedly.