| 21. | We have to tighten up where we have to tighten up.
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| 22. | When a back injury occurs, the tissues around it tighten up.
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| 23. | The Belgian police are now desperately trying to tighten up security.
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| 24. | I think we have to tighten up the brushing a little at nighttime.
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| 25. | There are a lot of things we need to tighten up.
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| 26. | There's even heartburn surgery which tightens up the lower esophageal sphincter.
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| 27. | It tightens up flabby tissues to enlarge the air passages.
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| 28. | We need to really tighten up the laws we have.
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| 29. | But that doesn't mean we have to tighten up ."
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| 30. | I felt my quad tighten up out of the turn,
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