Example sentences of "about half the " in BNC.

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31 About half the schools surveyed in 1968 succeeded in maintaining this policy for three full years .
32 In fact , in winds of Force 3 to 5 it only does about half the work in getting your weight over the back foot , the rest is up to you .
33 Ford estimates that in academic libraries as much as one-third of all items used are found by discovery at the shelf , and in public libraries about half the books borrowed are located in this way .
34 Bait will be a piece of crust about half the size of a matchbox , torn from a new loaf .
35 Mozambique has one of the highest infant mortality rates in the world , approximately 200 per 1,000 live births.4 Those who depend on emergency support because of war and drought number about 1,690,000 and about half the population is wholly or partially dependent on food aid .
36 We should note that over the next decade about half the children aged from 7–11 years will not have adequate conditions to attend primary school normally in terms of the law on the National System of Education and that many other older children will be likewise unable to attend school .
37 C. In many small towns ( 10 000–50 000 people each ) and in villages , along the eastern edge of the Pennines , about half the workers have jobs in coal mines .
38 An increase in the amount of carbon dioxide is responsible for about half the total warming .
39 About half the developers associated with UDG-supported projects intended to further their urban activities .
40 Yet families living in overcrowded conditions in Newham , Southwark and Tower Hamlets increased from 16,000 to 25,000 between 1984 and 1988 , at which date about half the dwellings in these three boroughs were classified as unsatisfactory ( Docklands Consultative Committee , 1988 ) .
41 During this period a regular wintering flock established itself at Chichester gravel pits , which reached a peak of 43 birds in December 1969 and accounted for about half the records for each winter .
42 The main concentrations occur at Chichester and Rye Harbour gravel pits , where flocks of up to 400 birds are regular and which , combined , hold about half the county population .
43 About half the proven breeding population is concentrated at Chichester gravel pits ( up to 31 pairs ) , and Rye Harbour gravel pits ( up to 16 pairs ) , with six or seven pairs breeding in some years on each of Burton Ponds and Darwell Reservoir .
44 found , in 1976 , that about half the searchers who learned to use online systems informally , first learned from the user manuals .
45 A corresponding survey , carried out in Sweden in 1981 , found that orientation courses had only been evaluated in 8 libraries of 34 , one-third of the libraries had evaluated courses in manual information retrieval and about half the libraries with courses in computerized information retrieval had carried out some form of evaluation .
46 In detail , about 3000 young males join the adult breeding population each year , and thus make up about half the total of breeding males .
47 About half the faults of the eventual 955 types collated were in the outer structure .
48 The USAF will operate about half the total from Alconbury , and most of the rest will carry equipment to detect enemy radars .
49 Even now the World Health Organisation estimates that 107 countries are affected and that about half the world 's population is exposed to the risk of infection .
50 The number , which has been confirmed by the National Communicable Disease Surveillance Centre in London , is about half the figure frequently reported .
51 This agrees with the observation that human marathons are won at about half the speed of 100 m sprints .
52 Correll found that during the summer about half the river 's estuarine loadings of nitrogen come from the sky .
53 The Primary Education Improvement Project in Northern Nigeria has produced a programme for the lower classes where more formal subject-based lessons were planned to cover about half the teaching time , but complemented by a carefully planned activities programme based on group work .
54 The new rises are about half the current inflation rate and we can now offer customers better value for money . ’
55 ( About half the world 's three million boxes are rented , and the rest owned by shipping lines . )
56 Proteins , which generally comprise about half the total mass of biomembranes , determine the specific membrane functions .
57 The strange thing is that not all amateur operators seem to understand this and only about half the country 's licensed amateurs are members of the RSGB .
58 Nevertheless to make it really easy to reach your daily dietary fibre target of 30g plus , it is an excellent idea to have one regular , constant daily meal breakfast is ideal because we tend not to vary our breakfasts — to supply about half the requirement .
59 A tank can be maintained without filtration , but more work is involved and only about half the number of fish can be kept .
60 For example , the B string is about half the level of the top E , and the bottom E is louder than the rest put together !
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