| 21. | For many such people, the Internet has become an engine driving their fears.
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| 22. | Clearly, one major engine driving these changes is rapid economic expansion.
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| 23. | American high-tech investment in Ireland has been a key engine driving Irish growth.
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| 24. | On petrol machines the engine drives both the cylinder and the rear roller.
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| 25. | You can't see the engine driving in front of you ."
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| 26. | Students have been one of the main engines driving the protests.
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| 27. | Gone is the original Bug's unconventional air-cooled, rear-mounted engine driving the rear wheels.
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| 28. | France and Germany have traditionally been viewed as the engine driving European integration.
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| 29. | One of the engines driving Antioch and Highland is evangelical enthusiasm.
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| 30. | It was replaced by a steam engine driving an Gwynnes pump in 1896.
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