| 21. | Normally, the spring thaw begins in early May.
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| 22. | Some rocks posed much danger to boats, especially during the spring thaw.
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| 23. | However, the spring thaw meant that the tanks were impossible to use.
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| 24. | The river takes its source form the spring thaws.
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| 25. | Her theatre performances have included the " Spring Thaw " review.
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| 26. | Then comes the spring thaw, then summer.
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| 27. | Human rights investigators plan to start searching for the dead with the spring thaw.
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| 28. | Human rights investigators plan to start searching for the graves with the spring thaw.
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| 29. | Nonetheless, it heaves extensively each spring thaw.
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| 30. | Continuing operations by the Central Powers were also made difficult by the spring thaw.
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