| 21. | But those differences are like shifting sand dunes.
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| 22. | It was all about shifting sands, time passing, the future being uncertain.
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| 23. | Most of the bridge is built on a gravel bed covered by shifting sand.
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| 24. | Eventually it disappeared back under the shifting sands.
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| 25. | But you can't mean that, as the definitions are shifting sands.
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| 26. | The whole area was mainly shifting sand dunes prior to 1947 when afforestation began.
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| 27. | The cannibal is able to escape the shifting sands, leaving Crusoe to sink.
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| 28. | He said the opposition's case rested on " shifting sands ."
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| 29. | In 1996 a wooden structure was built but shifting sand soon rendered its foundations unstable.
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| 30. | How is that " shifting sands "?
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