Example sentences of "[to-vb] [noun] [prep] a long period " in BNC.

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1 The large amounts of data needed for such an analysis were obtained by means of a participant observation method which allowed the investigator to record speakers over a long period , returning to collect more data if specific gaps emerged in the course of the analysis ( cf. 3.1 ) .
2 It then lends the money to house purchasers for a long period of time by granting mortgages ( typically these are paid back over 20 to 30 years ) .
3 Iron fittings could replace wooden components gradually , allowing major alterations to take place over a long period .
4 It had to take place over a long period , in the face of a prodigious number of uncontrolled variables which were likely to confuse the outcome .
5 The length of time it has been operation will determine how much money she gets back , but it is unlikely to have made much of a profit , because endowments are designed to make money over a long period of time .
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