troublesome problem

“Central to constraining this epic history is the presence of a magma type unique to the Moon, but explaining how such magmas could even have got to the surface, to be sampled by Space missions, has been a troublesome problem. It is great to have resolved this dilemma.”

“Although initially appealing as a simple solution to a widespread and troublesome problem, vaccination is neither a solution nor simple,” said Tom Super, the council’s senior vice president for communications.

It’s not surprising that the same monks who later deliberately wash their hands of the troublesome problem of Beatryce have failed that test, and fear her as a thing possessed by demons.

Yet intercepting communications has remained a troublesome problem for the police.

To Seahawks fans who are understandably frustrated to see one of the team’s brightest young stars suddenly encounter such a troublesome problem, that comment might appear rather nonchalant when read in print.