Example sentences of "[conj] [verb] [prep] a long period " in BNC.

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1 Some were more active than any predecessor against some particular organism , and some had special merits in use , such as working when given by mouth , or acting for a longer period than usual .
2 Another reason for our inability to give accurate figures is due to the prevalence of several other types of population movement , some of them on a huge scale , although extended over a longer period .
3 In the Chandni Chowk shopkeepers boarded up their premises , buried their treasure and prepared for a long period of unrest .
4 Signatories of GATT could institute tariff changes which might discriminate against third parties only if done over a long period of time , so giving those third parties the opportunities of adjusting to the change without suffering severe economic disruption .
5 Although mistrusting children , he showed an absorbed interest as he took the photographs and gazed at Henrietta ( fourteen ) , Samantha ( just ten ) and the baby Jacqueline ( now three and born after a long period during which Hugh had displayed a lack of interest in physical contact ) .
6 As in most parts of Britain the Hercynian movements at the end of the Carboniferous were accompanied and followed by a long period of erosion .
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