Example sentences of "it is [adv] necessary [verb] it " in BNC.
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| 1 | If money supply is to be monitored and possibly controlled , it is obviously necessary to measure it . |
| 2 | and it is usually necessary to remove it by flocculation with alum or alum with sodium aluminate , followed by filtration ; the final pH should be adjusted so as to be close to neutrality on the alkaline side . |
| 3 | It is always necessary to set it against a more general background or to establish the conventions and limitations adopted by the makers of these small and almost two-dimensional objects . |
| 4 | It is then necessary to market it , through lectures , seminars , and meetings with governments , business interests , and lawyers , in order to generate a groundswell of support which will help to ensure ratification . |
| 5 | Whilst design is , in practice , an involved and complex set of events , at this stage it is only necessary to define it as three interrelated sub-processes ( see Figure I.l ) . |