I am sorry that circumstances prevent us from meeting more often, when there is no business to discuss.

Though attempts were made at burning the bridge, circumstances prevented it.

He wanted to study medicine but financial circumstances prevented this.

In the long run, though circumstances did not prevent material survival, they made for mental decline.

Two circumstances have prevented the shortage of aircraft from becoming even more severe.

Several circumstances, including his lack of influence, prevented this.

But current circumstances have prevented us from properly doing our job.

But he had decided that circumstances would prevent it.

He had planned to visit India, but various circumstances prevented this journey.

However, although the ship is successfully repaired, circumstances prevent them from ever going through with it.