Example sentences of "shown to [be] essential " in BNC.

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1 The presence of at least some specialist assistance has been shown to be essential for raising the standards of the whole team .
2 Contrary to the official establishment line on fluoride , this substance has never been shown to be essential for body function , and its role in protecting teeth from dental caries is extremely doubtful .
3 A thorough understanding of the way official statistics were collected and of the workings of the administration is shown to be essential for the proper interpretation of these data .
4 This education may go well beyond simply fostering understanding of the change itself ; it may include needs assessment and subsequent training in the skills and knowledge that are shown to be essential to functioning successfully in the changed environment .
5 The expression of ICAM-1 and two of its counter receptors , the lymphocyte function associated antigen-1 ( LFA-1 , CD11a/CD18 ) and the complement receptor type-3 ( CR-3 , MAC-1 , CD11b/CD18 ) was shown to be essential for most of the lymphocyte/lymphocyte , lymphocyte/phagocyte , and leucocyte/endothelial cell interactions in the immune response .
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