But he knew the layout intimately, for he had spent a good deal of expensive, frustrating, and occasionally dangerous time in almost identical rigs.

Scholarly exploration of early printing's evolution into a contentious, unsavoury and occasionally dangerous business.

This movement can occur during the milling process, making it occasionally dangerous to perform certain operations without appropriate safety controls in place.

But they're illegal and occasionally dangerous.

It was a great privilege to work with fantastic colleagues in difficult and occasionally dangerous circumstances through the early days of the Arab Spring.

Their cures were always fake, usually harmless, occasionally dangerous.

They remained, almost inevitably, quite insane and occasionally dangerous.

For many years electrostatic loudspeakers had a reputation as a generally unreliable and occasionally dangerous product.

His journeys are tough and occasionally dangerous.

The work is both hard and occasionally dangerous.