Example sentences of "is [verb] over a [noun] [prep] " in BNC.

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1 A retaining wall of loose bricks or stones separate the bog garden from the pool proper and retains the peaty mixture which is placed over a layer of gravel .
2 Travel agents and tour operators often make back to back reservations which means that certain accommodation is booked over a period of time and as one group of guests depart another group takes their place .
3 At Congleton the canal is carried over a road at the south-east side of the town by a cast-iron aqueduct , built around 1835 , on curving masonry abutments .
4 It is named after the book by Stoppani , whose portrait is imposed over a map of Italy on the foil packaging .
5 The blessing itself is made over a cup of wine in honour of the day ( ‘ Blessed art Thou , O Lord our God , King of the universe , who createst divers kinds of spices ’ ) which adds to the light of the Sabbath , symbolised by the candle , offering a fragrance and a beauty all its own .
6 In a different class of important circuits , positive feedback is applied over a band of frequencies from zero frequency upwards .
7 Examination of the mechanical behaviour shows that there are five distinguishable states in which a linear amorphous polymer can exist and these are readily displayed if a parameter such as the elastic modulus is measured over a range of temperatures .
8 These are both particular kinds of relaxation spectroscopy in which the sample is perturbed by a sinusoidal force ( either mechanical or electrical ) and the response of the material is measured over a range of temperatures and at different frequencies of the applied force .
9 The tape is played over a pair of stereo headphones to the subject who hears one member of the stimulus pair at one ear and the second member of the pair at the opposite ear .
10 If this loyalty is stretched over a period of 28 years , it is certainly worthy of note !
11 Such mixture of affective psychosis and schizophrenia may be revealed in changes in the symptom profile that are observed when the person is studied over a period of time , or it may be evident within a single episode of illness .
12 The best effect is achieved over a period of years , but at worst you really ca n't come to much harm .
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