But think about how it could play out: If energy truly were free and unlimited, you could, for instance, power tractors everywhere in the world. [Please select]
0
Every now and then we pass steam-tractors at work, ploughing huge fields into regular furrows. [Please select]
0
The French Department of Agriculture purchased in America nineteen teams of ten tractors apiece in the autumn of last year. [Please select]
0
Tractors are seen at work here and there, and agricultural machinery is under the sheds. [Please select]
0
"You mean the armored tractors--those things that climb fences, trenches, and things like that." [Please select]
0
And farm tractors were almost unheard of before the late 1920s. [Please select]
Do you have a better example in your mind? Please submit your sentence!