Example sentences of "[adj] for long period [prep] time " in BNC.

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1 Once initiated such a complementary system of uplift and subsidence is probably self-sustaining for long periods of time in the absence of major tectonic disturbance .
2 The identity , however , is converted into a theory of the determination of the price level by assuming : ( a ) that the money supply is determined by the monetary authorities ; ( b ) that the number of transactions is fixed in the short-run because of the classical presumption that the economy operates automatically at full employment ; and ( c ) that the velocity of circulation is also fixed in the short-run because it depends largely on institutional factors ( such as whether workers are paid weekly or monthly ) which themselves tend to remain constant for long periods of time .
3 If people are kept awake for long periods of time , their drowsiness lessens in the morning and comes on with increased severity in the evening .
4 By the following weekend , Ned had begun to lose interest in his lover and within two weeks , much to her distress , he began leaving her alone for long periods of time while he chased after a very attractive Border Collie who had just moved into a neighbouring street .
5 He said it was not usual for patients to be left alone for long periods of time and organisation on the ward involved was usually very good .
6 This type of palette is designed to keep acrylics workable for long periods of time , which eliminates the worry of them drying too quickly .
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