Example sentences of "of about 20 [noun] " in BNC.
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| 1 | In water , at least 40% of UV radiation is transmitted to a depth of about 20 inches , which means that it is easy to get burned when swimming . |
| 2 | A group of about 20 girls arrived at the Outreach Farm centre in Lancashire that wet Wednesday morning . |
| 3 | This would also have reproduced John 's set-up more closely as well , since he had a large group of about 20 adults . |
| 4 | Heights are usually up to 12.5 metres and lengths of about 20 metres . |
| 5 | The sixth patient was a 33-year-old man who was admitted after a suicide attempt by inhalation of car engine exhaust fumes and ingestion of about 20 mg of flunitrazepam . |
| 6 | Most notable was the appearance of a flock of about 20 shore larks in clifftop fields at Gristhorpe between Cayton Bay and Filey . |
| 7 | The ambassadors to the European Communities ( EC ) , and to France and five other countries were also replaced ; nine embassies and 11 consulates general were to be abolished , and the staff of about 20 others to be severely cut . |
| 8 | As previously suggested by SDS sequestration techniques [ 1,12-19 ] , the dissociation reaction is slow , with a half-life of about 20 minutes at 20°C . |
| 9 | Currently the band have a repertoire of about 20 Hendrix tunes , with Slim occasionally going the whole hog playing guitar behind his head and often performing a full Woodstock style Star Spangled Banner , much to the delight of the crowd . |
| 10 | It hit the ground near the group of about 20 protesters . |
| 11 | Their intention was to close 31 pits immediately , and leave a coal industry of about 20 pits and opencast at its present level . |
| 12 | Having recently been involved in the revision of about 20 standards dealing with the analysis of iron , steel and ferro-alloys for the British Standards Institution ( BSI ) , I have just learned that in all these documents the spelling of sulphur is to be altered to sulfur , for the element and in the names of all its derivatives . |
| 13 | This resulted in the loss of about 20 staff , bringing the total headcount here to 100 . |
| 14 | ‘ It is no exaggeration to suggest that the consequence of a failure to secure planning permission for a change of use may be the complete shut down of the Sundial with the loss of about 20 staff , ’ he said . |
| 15 | A CRT light-pen was used for input of script , and possible answers were lists of about 20 words . |
| 16 | It was on one of these occasions that Guy Gibson was ushered into " Cocky's ' presence and , just prior to his appearance , the AOC had given me a slip of paper with the names of about 20 pilots whom he asked me not to recruit — as a favour to him — which was his style . |
| 17 | The field is estimated to have reserves of 700 billion cubic feet of gas and will have a life of about 20 years . |
| 18 | If the experience with partial gastrectomy and truncal vagotomy is relevant , a latency period of about 20 years is required before any cancer risk becomes apparent . |
| 19 | Ninth century records show that the Maharajah of greater Delhi had a very fine harem of 18 young and nubile wives , who lived in an enclosure of about 20 acres . |
| 20 | If you let go of it before the fire button is released , the ball is kicked at an angle of about 20 degrees to the direction of travel — ideal for shots at goal . |
| 21 | A steady decrease in the rotation rate has been interrupted at intervals of about five years by glitches : discontinuous increases in rotation speed followed by partial recovery in the form of an exponential return to a new slowdown rate on a timescale of about 20 days . |
| 22 | Another camp of about 20 tents was also destroyed , and there were further air strikes on March 10 . |
| 23 | This allows the capture of 14 animals — eight ( including the seven females allowed ) are already in zoos — which means that there will be a population of about 20 animals with which to attempt captive-breeding . |
| 24 | It was , incidentally , a journey of about 20 miles , and it is an interesting reflection on the times that no one saw any danger in an 11-year-old embarking on such a trip alone . |
| 25 | The remnants of the Japanese Red Army — a group of about 20 people — are believed to be living in Lebanon . |