Example sentences of "[prep] the [noun] over a long " in BNC.

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1 However , at Cosmeston the archaeologist has the opportunity to excavate a large portion of the settlement over a long period of time and to use the results to shed light on sites where the excavators have not been so fortunate .
2 If the state of the weather over a long sequence of days were observed , and record W or D for each , one could work out how often
3 In Britain these are in a state of flux although there has been much discussion about the role of the inspector over a long period of time .
4 It said that its study had not discovered any conclusive evidence on the damage done to humans by low-level exposure , but it stated that the lack of information and knowledge of the effects of exposure to low doses of the chemicals over a long period had led the working party to adopt the precautionary principle that absence of evidence was not evidence of absence .
5 Other types of skin cancer are associated with continued exposure to the sun over a long period .
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