Thus there are few broken lines to parallel the cratered surfaces and broken-off noses and limbs of the sculpture, not even lines or tones showing the teeth or grain of paper.

FORBES: Seeking The Perfect Summer Art Cocktail

The ionic layers are also very close indeed to the surfaces of the electrodes, and obviously run parallel with them whatever their shape.

ECONOMIST: Electricity storage

This works best when the electrodes are parallel with each other, which means they need to have smooth surfaces.

ECONOMIST: Electricity storage