| Culture provides identity and, in a fast-changing world of displacement and rootlessness, becomes ever more important. |
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| Changes of this sort would, I feel, help to establish the book as an important authority in this crucial and fast-changing field. |
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| In this fast-changing technological world, knowledge of computer operations has become absolutely essential. |
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| He is so tied up with his own problems, in a fast-changing, competitive business, that he has no time for his musicians as anything but potential moneymakers. |
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| Some of its megaprojects are so large, complex, and fast-changing that even national governments can't complete them alone. |
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