Sentence examples for been difficult to pinpoint from inspiring English sources

"But it's been difficult to pinpoint the genetic cause, probably because it's linked to low-frequency variants," says Marini.

But the precise complexity of how stem cell development is regulated throughout states of cellular change has been difficult to pinpoint until now.

Given the multiple functions of many inflammatory factors, it has been difficult to pinpoint their roles in specific (patho physiological situations.

It has been difficult to pinpoint the impacts of technology on employment, in part because the effects have been so widespread.

It is believed to be caused by infections that spread between people from contaminated food and water, but it has been difficult to pinpoint the cause of each case.

"The grave site has been difficult to pinpoint because the descriptions are, in fact, general, and in most cases secondhand," said H. Arthur Bankoff, the chairman of the Department of Anthropology and Archaeology at Brooklyn College.

Exact trade figures are difficult to pinpoint.

"I think it's difficult to pinpoint one single company.

It is difficult to pinpoint the birth of "going forward".

The stylistic antecedents of these schools are difficult to pinpoint.

But beyond that, it is difficult to pinpoint.