| 1. | David Blankenhorn argues that fatherlessness is the engine driving America's social woes.
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| 2. | A Butterley beam engine driving a scoop wheel was installed in 1833.
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| 3. | She had a triple expansion steam engine driving a single screw propeller.
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| 4. | Export growth, the engine driving the boom, fell to zero last year.
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| 5. | Analysts say it is the engine driving the business to greater accessibility.
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| 6. | Power was supplied by a converted Volkswagen engine driving a pusher propeller.
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| 7. | True, the engine driving 1997's outbreak of drive-in mania is pure nostalgia.
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| 8. | It had transversely mounted in-line four cylinder engines driving the front wheels.
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| 9. | All entered service powered by a steam engine driving a single screw.
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| 10. | Each pair of diesel engines drives a controllable-pitch propeller through a gearbox.
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