The level of the lake rises and falls erratically, alternately flooding our farmlands and dehydrating them.

His breath came in gusty gulps, his blows began to fall erratically.

The barometer had been rising and falling most erratically and there was no forecast to be made: the only thing to do was to carry on without one, and straight away.

Remmy's own breathing rose and fell erratically with the squawks of the infernal contraption.

He worried briefly about haring off on this project with Thread falling so erratically.

Shining a light through the French doors, he watched the artificial moon created by the flashlight's beam bob around the room, erratically falling across four elegant wing-back chairs, an ornately carved table, and original oil paintings.

Mortality fell only erratically and modestly during the eighteenth century.

The second was the barrage falling erratically as the barrels of heavy guns degrade swiftly but at differing rates during fire: for Arras, the rate of degradation of each gun barrel was calculated individually and each gun calibrated accordingly.