She counted twelve, but couldn't be sure, as the ones closest to the truck were frequently obscured from her line of sight.

The peaks of the island are frequently obscured by cloud.

A new low level lighthouse was commissioned in 1906 due to the problem of the high level lighthouse being frequently obscured by fog and cloud.

This natural sequence of events is frequently obscured when the condition is treated without taking the constitution into account.

In the sky above, the moon had appeared, but it was frequently obscured by quick-skidding clouds.

Unfortunately, these philosophical nuggets are far too frequently obscured in a haze of B-movie clichés.

They display faces frequently obscured by shadows or hidden by extreme angles.

Seamus Milne often makes telling points but these are frequently obscured by a tendency to wild exaggeration unsupported by the facts.

Testaverde was under pressure and his line of vision was frequently obscured.

Yet the book's strengths are frequently obscured by incongruous displays of erudition and the workings of Fern's deeply idiosyncratic mind.