These microalgae are not associated with sewage but occur unpredictably as algal blooms.

But when the vowels are different, stress can occur unpredictably.

They occurred unpredictably, as though at the behest of another, which convinced Marika that she was the focus of the anger of her dead.

"It can happen to anybody," Dr. Bernard said, adding that the majority of cases occurred unpredictably, in previously healthy people.

Because the attacks occur unpredictably, dread of having an attack in public leads many people to avoid going out.

Terrorist acts occur unpredictably, making it impossible to protect yourself absolutely.

UA may occur unpredictably at rest which may be a serious indicator of an impending heart attack.

"dE" for "delta-Energy", means the change of energy that can occur unpredictably.

Mood swings and strange behaviors occur unpredictably.

Where long consonants occur unpredictably they are indicated with an apostrophe following the consonant.