Example sentences of "for a long period [verb] " in BNC.

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1 Scientific work into the effects of vitamin E deficiency revealed that , in extreme cases , male animals deprived of the vitamin for a long period suffered irreparable damage to their testes .
2 One fishing vessel that we had been watching for a long period had more than one narrow escape from detection by British controls , but was finally turned back by Dutch customs patrols shortly after leaving a Continental port with a cargo of immigrants on board bound for the UK .
3 If the file is likely to be out of the sling for a long period put a note in the sling itself to show the new location .
4 The risk of a very old person falling and being left for a long period lying on the floor is a sufficient anxiety to encourage some families to opt for residential care for their elderly family member , when with enough support it might not be necessary ( Challis and Davies , 1985 , p. 571 ) .
5 Indeed , as the indices stubbornly refused to improve , there seemed little prospect that interest rates would not remain at this historically high level for a long period to come .
6 In addition , income security for a long period decreases the risks associated with the investment .
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