Example sentences of "about twenty " in BNC.

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31 In the early eighteenth century about twenty families lived there , and according to the census of 1801 it had a population of 137 [ Baker , 2 , 720 ] .
32 It is now estimated that about twenty kilograms of uranium escaped through the pile chimneys , posing a risk even greater than that from the short-lived 1957 accident .
33 They were expected to take about twenty minutes to sink to the bottom .
34 Eventually they identified a shortlist of about twenty areas where the rock formations were considered suitably stable and dry to keep the nuclear waste containers intact over the long timescales envisaged .
35 The classic example of AGR failure , the Dungeness B plant on the Kent coast , eventually took about twenty years to finish , cost £3.5 billion to build ( at 1988 prices ) — roughly five times its original estimate — and has never operated at even half its intended capacity .
36 The museum extends to about twenty rooms on two floors , and the visit starts with a room of ancient weaponry and then moves on to rooms that contain sacred parchments and vestments — some with designs from the school of Leonardo — and lace .
37 At last , after about twenty minutes ' wandering , her feet soaking wet inside her leaking boots , and her leg muscles aching from wading through the snow , she arrived at the car park outside the administration block , and found her car .
38 To the fore of the courtyard about twenty male , mostly young , dancers shake their bodies rhythmically but independently as a man carrying a pot of burning incense weaves among them .
39 Every detail was spectacular , yet the whole formed a nothingness of intense light and cold ( about twenty degrees below zero ) .
40 We only have half a dozen species in our coastal waters , but the Mediterranean supports about twenty varieties .
41 After about twenty minutes , walking and fishing , she realised that she was hopelessly lost .
42 It was followed about twenty years later , in 1271 , by the forecast of a purely mechanical chronometer by Robertus Anglicus ( ‘ Robert the Englishman , ) in a commentary that he wrote on the Treatise on the Sphere of Sacrobosco .
43 In the Columbia River area of the western U.S.A. where most of the lavas were erupted about twenty million years ago , such vast amounts of basalt were poured out on to the surface that hills 1,500 metres high were drowned in lava !
44 About twenty metres down from the top , Priestley realized that the tin they had left in the cairn in fact contained their exposed photographic plates , and that what they were carrying down with them was the tin containing the record of their ascent .
45 He had his specially built twelve-foot big-wave gun , weighing about twenty pounds , ready and waiting .
46 About twenty minutes later he looked at me and said , ‘ Well , I was thinking about advertising a job that looked something like this . ’
47 There is even a condition known as ‘ intensive care psychosis ’ which is said to affect about twenty per cent of those who have been patients in hospital intensive care units .
48 It is a good idea to practise this technique using the same piece of music each time and the length of one side of a cassette or record ( usually about twenty minutes ) is just about right for this exercise .
49 These were dug as a method of extracting coal at fairly shallow levels , and were usually only about twenty feet deep .
50 When we were about twenty yards away from them an old woman turned and saw us. I just had time to see the panic on her face before the driver applied the brakes .
51 Malleson carried my things down to the other block under his greatcoat and I followed him down the path about twenty yards behind .
52 Do n't try to hurry the programme of exercises , which should take about twenty minutes or so .
53 It involves about twenty minutes of mild discomfort .
54 Castlebar is only about twenty miles from here and Mr Durkin 's automobile can do twenty-five miles an hour . ’
55 About twenty or twenty-five guests would assemble at six o'clock , and we would play party games until supper .
56 And a dozen of my military colleagues will arrive about twenty minutes beforehand .
57 And it had been there , about twenty minutes later , that Thiercelin had received his wound ; a shell splinter in the cheek , which looked worse than it was , bleeding profusely into his collar and tunic , so that he had been ordered back to the chateau to have it dressed .
58 She was probably about twenty at the time and on her return created quite a furore among the ladies with her hair shingled in the latest fashion and sporting lipstick and rouge which was almost unknown at that period .
59 I entered into the spirit of the occasion by volunteering as one of about twenty stage guinea pigs , but within minutes I had been weeded out and sent back to my seat .
60 The Battalion entrained en route to the Lillebonne district about twenty miles from Le-Havre , A company along with B billeted at Gruchet-la-Vallasse , most men in open barns .
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