Example sentences of "[vb -s] [vb pp] on the [num] " in BNC.

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1 Most recent geographical research work has concentrated on the three related problems of declining public transport , centralization and reduction of rural services , and increased rural deprivation .
2 This debate has centred on the two views of bureaucracy found in the writings of Marx himself , one presenting it as an instrument by which the dominant class protects its interests , the other as an instrument of power through which the state is able to rise above and regulate class conflict with a measure of autonomy from the dominant class .
3 This year the excitement has centred on the 23.7 per cent shareholding which Elders , the Australian group , has to cut to 9.9 per cent .
4 If you think about this it 's based on the four carbon structure so you 've got ta have a few in the name there is a carbon carbon double bond so the basic structure we 've got is the Butane but as there is more than one position you could have that carbon carbon double bond now , to indicate this position and so this one would be called futes it would normally be a butane but to indicate it 's position bute one E and again you 're taking the lowest number so instead of it being a bute three , it 's a bute one E you start at the appropriate .
5 What 's happened on the two or three times ?
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