Example sentences of "[subord] it [is] difficult [verb] [noun pl] " in BNC.

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1 And we have to acknowledge that , although it is difficult to flip planets over , there is good evidence that similar things have happened in the past among the outer planets of the Solar System .
2 With these processes , our edge processes and the technique of conjugation , one can actually solve all four of our basic subproblems independently of the others and it is possible to do them in any order , although it is difficult to orient pieces that are not yet in their correct position .
3 If it is difficult to change habits like smoking or drinking , despite the best of intentions , then the switch to nut steaks and vegetable lasagne might be just as painful , and for those forced to it because of the unavailability of meat it would also be deeply resented .
4 Because it is difficult to incorporate contingencies of this kind contracts will inevitably be incomplete specifications of the rights and obligations of the contracting parties .
5 Most research does involve consulting professionals ( Cloke , 1983 ; Eastman , 1984 ) as it is difficult to identify abusers or victims .
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