Producing meaning

Or how about cows producing human milk?

Katie's mouth worked without producing sound.

Its most important industrial establishments are the mirror manufactory of St Gobain and the chemical works at Chauny, and the workshops and foundries of Guise, the property of an association of workpeople organized on socialistic lines and producing iron goods of various kinds.

His mouth worked without producing a sound, and his eyes watered.

The vents rattled without producing heat.