Example sentences of "not always possible [to-vb] [adv] " in BNC.

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1 It is not always possible to say precisely which kind of eyes these are pretending to be , but the chances are that in most cases they are mimicking the forward-facing eyes of birds of prey .
2 For this reason , it is not always possible to carry out the preferred size or type of investigation until certain data or resources become available .
3 However , the TNC-dominated export industries tend to employ more women than men.The reasons for this have stimulated a great deal of argument and it is not always possible to generalize cross-culturally .
4 As illustrated in figure 4.2 , it was also not always possible to relate fully all input costs to programmes .
5 As we have said , it 's not always possible to pin down the exact reason for Cystitis attacks , or why some women suffer so repeatedly .
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