Example sentences of "[be] [vb pp] for [art] long period " in BNC.

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1 A behavioural response is strengthened when it has an increased probability of occurring ( frequency ) or when it is likely to be performed for a longer period of time ( duration ) .
2 Does my hon. Friend agree that when such councils involve constitutional amendments to the treaty as well as , as always , substantial business for the Heads of Government to transact , some new formula should be produced whereby meetings could be scheduled for a longer period ?
3 Begin the list with the projects that have been waiting to be finished for the longest period of time .
4 The picture was not seen as ‘ a moment of time ’ but the wings were assumed to be spread for a long period ( Goldsmith , 1984 , pp.2–3 ) .
5 If an experiment produces animals that are to be kept for a long period , or that are to form the basis of a breeding colony .
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