Communication in every sense is proving to be the essential issue in Haiti.

通讯问题无疑是阻碍海地救援的根本问题。

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They insisted they wanted to work in partnership with the council to resolve the asbestos issue, but said "this is proving difficult to achieve in all of the circumstances".

BBC: Cwmcarn High School

The issue there is that proving the origins of processed metal can be very tough.

BBC: Scrap metal theft 'on same level as drug scene'