A fire burned constantly to combat the cold mountain air, and smoke escaped through an open window.

But they had only one day's supply of oil to light the flame, which was supposed to burn constantly.

A fire to run the still was kept burning almost constantly with wood from the hull of the wreck in which they were living.

This rare spring releases methane, which has been burning constantly for around three centuries.

Our bodies constantly burn calories, even when we're doing nothing.

Even so, he kept his fires burning for three years constantly, which "brought him more joy than any worldly goods."

A bed of coals burned constantly in my stomach.

Since then, a flame fuelled by gas has been constantly burning on the front of the monument.

And never had he imagined that rage could burn so deeply or constantly.

The direct lines to Washington burned constantly now.