| 21. | Nor is he able to find dangerous concentrations in water samples.
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| 22. | We are simply not politically far enough to achieve such concentration.
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| 23. | Nerves, physical exertion, the crowd breaking down your concentration.
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| 24. | My concentration and focus have to be on winning this week,
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| 25. | Any concentration of power in America has to be looked at.
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| 26. | That could expose consumers to a frightening concentration of information sources.
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| 27. | That's because plotting the exchange points demands maximum concentration.
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| 28. | So you ride with a tremendous amount of focus and concentration.
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| 29. | Competitors say helmets make them lose their concentration, Lammers said.
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| 30. | It's just a matter of his concentration ."
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