Sentence examples for been difficult to characterize from inspiring English sources
The position of the Comptroller General in the Government has always been difficult to characterize.
The complex, partially redundant gene regulatory architecture underlying vertebrate heart formation has been difficult to characterize.
Although promising for biomimetic materials applications, polypeptides binding inorganic material surfaces and the mechanism of their function have been difficult to characterize.
However, for virtually all GPCRs, active agonist-bound intermediate states have been difficult to characterize experimentally owing to their higher conformational flexibility, and thus intrinsic instability, as compared to inactive inverse agonist-bound states.
While there are numerous publications that report diffusion changes in response to particular, histologically confirmed tissue abnormalities in animal models of disease, the microscopic correlates of altered diffusion parameters due to neurological disorders in humans have been difficult to characterize.
Thus, it has been difficult to characterize the coating layer directly because of the small particle size of the pristine powder, the very low thickness of the coating layer, and the rough surface of the positive electrode.
It's difficult to characterize music in simple, sweeping terms.
"It's difficult to characterize a vacation house as something other than a luxury, a bauble," Kevin Daly concluded.
