Example sentences of "[adj] [verb] for long periods " in BNC.
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| 1 | 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 . |
| 2 | He was very tired and found it hard to concentrate for long periods of time . |
| 3 | 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 . |
| 4 | 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 . |
| 5 | You will need to be able to work for long periods with a high degree of accuracy , and have really good eyesight . |