Oil collects behind the plugs and the bacteria thrive, setting up conditions for acne.

The cold, collected voice in her mind and the power behind it gave her the first intimation she might have been mistaken.

Ruha twisted around, reaching back to collect something behind her.

"Indeed," said a deep, collected voice from the row behind him.

When Houston turned his army around he began collecting the refugee train behind his army.

Desalination is particularly relevant to countries such as Australia, which traditionally have relied on collecting rainfall behind dams to provide their drinking water supplies.

All babies tend to collect fluid behind the neck but those with Down's syndrome tend to have more fluid than most.

You know what I mean: those little balls of dust that collect under beds and behind doors and in comers.

Instead of being deposited on the shore, the sediment is now collecting in Lake Nassar, behind the dam.

Instead it collects behind the ice.