Example sentences of "[adj] [to-vb] for long [noun] " in BNC.

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1 For reasons of compliance it was not possible to plan for longer experiments ( our experiments lasted approximately eight hours from start to end ) .
2 He is a widower , with no family and few interests outside the hotel : as a result , he is prepared to work for long hours and generally acts as night porter during the week .
3 In addition to their role as refuse removers , these crustaceans also provide a valuable food source for some fish , particularly Mandarins , which are next to impossible to maintain for long periods in aquaria which are not well stocked with inverts and living rock .
4 He was very tired and found it hard to concentrate for long periods of time .
5 We found the machine was fairly comfortable to use for long periods , but the high body did make it slightly awkward to control in tight corners .
6 You body wo n't turn as much as it did before , you get tired more quickly , you 're less able to concentrate for long periods and have to allow for more errors .
7 You will need to be able to work for long periods with a high degree of accuracy , and have really good eyesight .
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