They require constant tending and turning so that the ripening, or affinage, as the French say, proceeds evenly.

Kashmiri bats require constant knocking and oiling to make the bat good enough to use in a cricket match.

Disc herniations can result from general wear and tear, such as when performing jobs that require constant sitting and squatting.

The character Emmanuelle in the game is a wife of French business man whose job requires constant travelling, thus leaving his wife unfulfilled.

In my testing, the heat required constant adjusting to keep the control modulated.

It will require constant guarding to prevent sabotage, though the fact that almost all of the pipeline is buried will make it harder to attack.

Cultures require constant mixing, and the harvesting of biosynthetic products is energy intensive.

They had not been able to travel fast, Wynne-Jones finding riding hard and requiring constant rests.

His round eyes are fixed upon the page as long as Frank is looking at him, but he requires constant watching.

It's a graceful solution, although not without its drawbacks: because the base has so much surface area, it requires constant dusting.