Example sentences of "[vb pp] over a long [noun] " in BNC.

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31 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 .
32 This is seldom needed for analysis purposes but random access mode is often used where the records are held over a long period and have to be updated with the passage of time .
33 Such factors may include , for instance , a previous experience of loss which was dealt with badly , unresolved grief , past experience of failure , a lack of a sense of self-efficacy , a low self-esteem , a previous history of psychiatric disorder , and an absence of close relationships established over a long period of time .
34 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 .
35 These real arts of the field man 's work can only be acquired over a long period , and they must be practised and refined by an officer on his own in the course of his work .
36 This technique was highly dangerous and required the skills that Cheshire had certainly acquired over a long period , but was equally within Gibson 's exceptional abilities .
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