Example sentences of "as has [be] demonstrated " in BNC.

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1 Central to the legislators ' notions of purity was an all-pervasive blood taboo which , as has been demonstrated above , embraced foodstuffs , sacrificial victims , humans , etc. , and very definitely separated out the male from the female .
2 As has been demonstrated elsewhere with regard to the generic probation setting ( Singer , 1989 ) , the supervision of offenders involves two overarching aims : namely support and surveillance .
3 The peaks also correlate with high NO 2 values , so our assumption is that in these episodes we are measuring lower-latitude air as the denitrified polar vortex moves away from the site under the influence of planetary wave activity , as has been demonstrated with previous NO 2 data .
4 Newspaper interest shifted , too , towards entertainment , and , as has been demonstrated , TV itself became an important item in the press .
5 What happened reflects upon the competence and judgment of my right hon. Friend , as has been demonstrated again recently .
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