The bowstring has to be drawn by hand without the use of mechanical assistance.

But neither of us likes making things hard on ourselves, and so we use mechanical assistance whenever possible.

Perhaps one day it would be possible for Man to travel among the stars without mechanical assistance.

The 29,000-plus may need mechanical assistance to make an impression tonight.

But nature will need mechanical assistance in this miniature world cut off from the larger forces of wind, weather and the earth's atmosphere.

Johanna still couldn't understand Tinish, and would certainly never speak it without mechanical assistance.

"Were you using your eyes or did you have some mechanical assistance?"

The race would be dependent on complex mechanical assistance to reproduce.

The volume was surprising, even without mechanical assistance: Urruah had been right about that, at least.

Everything was done by muscle power, without the succour of mechanical assistance.