They are often considered as a pair because of their combined effect on the cutting process.

Their combined effect pulled the Dow down about 29 points.

The combined effects of these drugs can cause an increased skin reaction.

In fact, research indicates that the combined effects of these problems may be greater than their individual impact.

"Then you also had the combined effects of the humidity these last two days."

The combined effect was such that she has not set foot on a boat since.

The combined effects of the food and climate, so different from England, take time to get used to.

Their combined effect was to put the business in the black.

The combined effect, teachers say, makes it difficult for them to concentrate.

The combined effect of these two shows is quite powerful.