Example sentences of "[noun pl] over a long [noun] " in BNC.
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| 31 | 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 . |
| 32 | The reason may lie in what happens to the teachers themselves when they first encounter it , rather than in the use they make of it directly with children over a long period . |
| 33 | The 30-nation talks in Geneva failed to bridge the gap between countries such as Germany and the Nordic states , which are seeking a 79 per cent cut in emissions by the end of the decade , and those like the UK and France which want a lower level of cuts over a longer period . |
| 34 | The incubation period may be up to one year , and this makes it difficult in many cases to decide from whom the warts have been caught ; not only that , but they often seem to have been seeded on the principle adhered to by market gardeners , to give successive crops over a long period . |
| 35 | Cook has incidentally been given a testimonial season by Transvaal for his outstanding services over a long period . |
| 36 | Batteries last longer if they are charged and discharged in deep cycles over a long period . |
| 37 | However , a syndrome of this severity is not commonly reported in foals under natural conditions , probably because larval intake is continuous during grazing ; it has been show experimentally that foals may tolerate large numbers of larvae administered in small doses over a long period . |
| 38 | 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 . |
| 39 | The main difference , though , was that while Pompeii was obliterated by the steady accumulation of ashes over a long period , perhaps as much as two days , Herculaneum was overwhelmed in a matter of minutes , possibly well after the eruption proper had ceased . |