From the first, construction was delayed by a combination of circumstances.

The drop has been caused by a combination of circumstances.

It was the combination of natural ability and circumstances that made her so adept.

Given a certain combination of circumstances, fear is sure to come.

"It had to have been an almost unique combination of circumstances, which I don't even begin to understand."

He would never have the same favourable combination of circumstances again.

The combination of circumstances could not have come at a worse time for the kosher food industry.

Never again, we reasoned, would there be a combination of circumstances like this!

It was due to a combination of circumstances, he insisted.

I'd love to know what combination of circumstances could destroy the universe.