Example sentences of "over a [adj] period " in BNC.
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| 31 | Your own , personalized weight control programme has not been a sudden thing but has evolved over a long period of time . |
| 32 | Within the orbit of the late Roman world , Christianity was primarily receptive ; it inherited a set of institutions ready-made , conformed to a social and political structure which had developed over a long period , and learned to live with a culture which it had little part in creating . |
| 33 | However , over a long period of time and association , horses and ponies can alter their thought patterns and learn to think more like each other , and to become more empathic . |
| 34 | But cases of die links between different places or over a long period of time are unusual . |
| 35 | As with any technique , direct mail has basic principles which must be obeyed if the programme is to communicate and raise money over a long period : * It must be regular ( a minimum of eight times a year ) * It must be personal , relevant and informal * It must be good quality * It must ask for and offer something * It must appeal to emotion first and reason second |
| 36 | There are few other industries in which , over a long period of time , revenues have covered less than half of costs . |
| 37 | 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 . |
| 38 | There was considerable vaginal dilation ; in my view , only consistent with full penetration over a long period . |
| 39 | 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 . |
| 40 | 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 . |
| 41 | In the short term , nitrogenous fertilizers , by increasing grasses and clovers , can result in an increase in the earthworm population , but continuous use of superphosphate or Nitro-chalk over a long period has been shown , in trials at Rothamstead , to reduce numbers in proportion to the amount of nitrogen applied . |
| 42 | The accumulation of data over a long period of time is a situation that lends itself well to the use of a microcomputer . |
| 43 | The only way that we could definitely ascertain the extent of the increase in recorded crime which is due to changes in reporting and/or recording practices would be if there were available victimization data over a long period . |
| 44 | It was the result of a carefully planned experiment based on numerous other experiments performed over a long period . |
| 45 | 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 . |
| 46 | The stimulating article Some library costs and options by Brown ( an economist ) concludes ‘ it seems to be worth acquiring and providing storage for , books likely to be wanted more often than , once in about 1.7 years over a long period ’ . |
| 47 | These fish are especially prone to ‘ conditioning ’ ; you can switch their minds onto a certain item of food and if you keep that food trickling through their swims over a long period they will continue feeding , with only short breaks , until that food runs out or some other disaster happens to move them . |
| 48 | This applied to many houses in the street , presumably brought about by the making up of the road with gravel over a long period . |
| 49 | All your behaviour , with the exception of those reflexes that were built into the system , has been acquired over a long period of ad hoc learning . |
| 50 | What was less obvious was the effect on the system as a whole , which had evolved over a long period of time influenced by a variety of political and economical pressures , and not necessarily in a methodical manner . |
| 51 | All the research programmes have come from approaches made to the Unit and have involved extensive discussions , sometimes over a long period , but not for bureaucratic reasons . |
| 52 | In fact the opposite seems to have occurred because Grevy 's zebra is in other ways a very different animal from the common zebra and it appears that in their stripes the two species have converged rather than diverged , over a long period of time . |
| 53 | The styles of learning in Koranic schools and catechist classes have predictable effects on the way children learn in school , but the missionary tradition in education is responsible for so much else besides , ( over a long period of the history of formal education the great majority of schools were missionary schools ) . |
| 54 | One disadvantage of this to all parties is that over a long period memories fade and evidence becomes more difficult to establish . |
| 55 | If we find that magnets attached to cats will upset their ability to find their way home , then we are beginning , very dimly , to understand the amazing homing abilities that the animals have evolved over a long period of time . |
| 56 | The explanation is that , given a totally unvarying diet over a long period of time , especially if it is from kittenhood right through into adult life , a cat 's ‘ food variety mechanism ’ gets worn down and is finally switched off altogether . |
| 57 | Cook has incidentally been given a testimonial season by Transvaal for his outstanding services over a long period . |
| 58 | There 's really no chance of getting bitten if your ferrets have been properly handled over a long period and are never scared . |
| 59 | If , on the other hand , your elderly parent shows a quite uncharacteristic withdrawal from her normal concern for you and for others and is totally obsessed in an agitated fashion with herself and her own troubles , over a long period , you should begin to wonder if , in fact , she is suffering from a true depressive illness and may be in need of medical help . |
| 60 | To give or receive help , perhaps over a long period , which inevitably involves some self-sacrifice on the one hand and some loss of independence on the other , is a very big step . |