Example sentences of "as it [is] difficult [to-vb] [art] " in BNC.

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1 I would suggest you monitor the water very closely for ammonia , as it is difficult to give a precise ‘ life ’ for ion exchange resins .
2 Do not attempt to use the harness on a run as it is difficult to control the gusts .
3 The Shareware version does n't allow you to sort any records and will not carry out automatic standing orders , which is a shame as it is difficult to evaluate a program that is not fully working .
4 However , as it is difficult to know the history of every disk you are presented with then it is better to be safe than sorry .
5 However , as it is difficult to know the history of every disk you are presented with then it is better to be safe than sorry .
6 As it is difficult to imagine a direct advantage conferred by shell banding for survival in wave-swept conditions , banding must be a pleiotropic consequence of a physiological or morphological trait that does affect life under those conditions ( Berry , 1983 ) .
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