Example sentences of "[adv] difficult to obtain [coord] " in BNC.
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1 | Characteristically , the data used may be more difficult to obtain and are usually more spatially aggregated ; modelling software which permits feedback loops is essential ; |
2 | They are emphatically against making divorce more difficult to obtain and unsympathetic to the idea that society should do more to protect marriage . |
3 | Imaging of organs that are characterised by periodic motion , such as respiration or the beating heart are more difficult to obtain and require synchronisation of the MRI scanner with , for example , the QRS signal of the ECG waveform . |
4 | Information is usually difficult to obtain or unreliable in less-developed countries , and the problem is obtaining enough of it that is relevant and trustworthy . |
5 | An alternative to water in sprays is needed in the tropics where water is often very difficult to obtain or transport to the field ; it evaporates so rapidly that the effectiveness of sprays is further reduced . |