Example sentences of "[noun] [noun pl] [prep] a long period " in BNC.

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1 What we are clearly seeing in some areas is roughly the same group of people exploiting the same local landscape for their subsistence requirements over a long period , but with successive generations living on different sites at different times .
2 Simulation has been used to predict population changes over a long period of time and for charting space-satellite trajectories .
3 Greek Intelligence must have been taking a more than passing interest in the activities of our friend Andropulos over a long period , years I would think .
4 ‘ For example , the lender can arrange loan repayments over a longer period , to help his customer through a difficult financial time and ensure that the loan is not written off ’ , reported Mr McKiernan .
5 Young people from working-class backgrounds , for instance , are more likely to spend time with a boy/girl-friend whereas young people from G middle-class backgrounds continue to move around in mixed sex groups for a longer period , perhaps anticipating an extended period of dependence on parents as they head for further or higher education .
6 In these respects , there has been a general and continuing decline in prison conditions over a long period of time ( King and McDermott , 1999 ) .
7 The problem of consistency of measurement techniques over a long period of time will have to be faced and may not have a satisfactory solution .
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