| 31. | Unlike typical thunderstorms that flare up and move by rapidly, train echo rains grind away along a single track without let up.
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| 32. | "We're going to grind away at him until we accomplish the military objectives, or until our political leaders tell us to halt,"
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| 33. | The dual rulings were a major blow to Bush, his hopes of a quick certification dashed as Gore's recount campaign grinds away.
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| 34. | Opportunity planned to use its rock abrasion tool to grind away on a feature called " Flat Rock " over the weekend.
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| 35. | Its teeth were flattened and could grind away at the leaves and young branches before digesting them at length in its large gut.
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| 36. | Messier said, " but it was great to see some of the younger guys like Aleksei Kovalev and Darren Langdon grind away ."
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| 37. | But the majority of players grind away week in and week out, always trying to make a cut, constantly concerned about exempt status.
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| 38. | The six-wheeled robot had been scheduled Thursday to grind away a tiny area of the weathered face of a sharply angled rock called Adirondack.
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| 39. | The Americans continued to grind away at the defenders in the Battle of Hurtgen Forest ( September 19, 1944 February 10, 1945 ).
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| 40. | A wood saw effectively grinds away at the wood, but I think this saw might be working by impacting its teeth with the glass.
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