| 31. | The concentration of contracts with a few suppliers also seems inexorable.
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| 32. | As always, there are areas where we need greater concentration,
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| 33. | Chess teaches concentration, creativity, problem solving and abstract thinking.
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| 34. | It taught him coordination, concentration and how to change leads.
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| 35. | He admitted that his concentration during the game wavered at times.
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| 36. | I was all over the track, my concentration was off.
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| 37. | It's a game of nerves, requiring incredible concentration.
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| 38. | Researchers measured concentrations of radon gas in homes for a year.
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| 39. | His entire family had been murdered in the Nazi concentration camps.
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| 40. | He died of starvation in the Theresienstadt concentration camp in 1942.
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