| 11. | They are abrading tools, used to grind away excess material and to smooth the work surface.
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| 12. | Oftentimes they grind away anonymously for small purses.
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| 13. | Supercomputers grind away for weeks on these problems,
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| 14. | Slow-moving tornadoes can be particularly devastating, because they grind away, sometimes for minutes at a time.
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| 15. | Jospin has also managed to grind away at France's high unemployment rate, which was his stated priority.
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| 16. | But you grind away because you're trying to find out what . . . you're doing ."
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| 17. | "Now we don't have to grind away perfectly good teeth to make a crown, " he said.
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| 18. | But even as these legal mills grind away, the industry continues to change at a remarkable pace.
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| 19. | The beak was kept sharp by having the edges of the dental plates grind away at each other.
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| 20. | Although the chairmen of CBS Inc . and the Westinghouse Electric Corp . continued to " grind away"
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