Yes, producing complete maps for the entire globe is indeed a difficult thing to do.

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Obviously, you had some direction and say in the movie, but is that a difficult thing to do?

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Retaining a dominant position is a difficult thing to do, particularly as bigger and better competition emerges, as Apple has seen.

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Ask if they would like to discuss your differences and, if so, to agree to avoid emotion-laden words, a very difficult thing to do.

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They have no idea though that what you are doing is a terrifically difficult thing to do.

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It's a very difficult thing to do.

BBC: Shirley Williams

That is a difficult and dangerous thing to do, because you're dealing with people who are highly volatile, and who may, if they so choose, keep you or kill you.

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"What was questioned was whether bees could decode the dance because it seemed like a very difficult thing for them to do, " Professor Riley explained to BBC News.

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But Mr McCain is also a brave politician, who has often tried to do the difficult not the expedient thing.

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To do the right thing at a point in time when it is difficult is the definition of a hero.

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And describing it in a way he described it was I think a fair thing to do as he laid out his own vision for what we should do to address these difficult problems.

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