Example sentences of "make it difficult [to-vb] [adj] [noun pl] " in BNC.
Next page| No | Sentence |
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| 1 | At Ruskington the inadequacies of the data make it difficult to draw firm conclusions , although there appears to be a smaller proportion of graves with amber than at Sleaford . |
| 2 | The increase in mean ozone concentration with latitude and the existence of seasonal cycles in ozone levels make it difficult to detect any trends in global ozone concentration . |
| 3 | There is no shortage of theorizing , of course , but the complexity of human society , the intangibility of cause and effect , make it difficult to test major theories in rigorous conditions or to overturn a consensus view once one has become established . |
| 4 | The technique has enabled spectra to be obtained from the metallic cores of some important biological molecules such as hemoglobin and some enzymes , where the low concentration of the metal and the low solubility of the substance itself make it difficult to study vibrational spectra in any other way . |
| 5 | In some areas , ignorance and taboos make it difficult to introduce new customs . |
| 6 | First , those items which make it difficult to recognise specific abilities in a child will be of less value than those which provide descriptions that can easily be applied . |