Their success cannot be said to have occurred without this.

For the most part, the election seemed to occur without major problems.

It is important to note that learning can occur without a change in behavior.

There are, however, cases in which learning can be shown to occur without good or bad effects following the behavior.

He seems to suggest that change occurs, with or without art's help, as in a game of chance.

In fact, he says the rescue could not have occurred without Brown.

In the beginning, this condition occurs suddenly without personal control.

This transformation has occurred without any change in the written law.

This would not have occurred without the threat of competition.

One death should not occur too soon after another, without a good reason.