Sentence examples for difficult and rigorous from inspiring English sources

Mr. Muldoon's poetry is difficult and rigorous, but it also "shimmers with play," a reviewer wrote in The New York Times.

Participant recruitment for HIV clinical trials is a difficult and rigorous process that is very demanding of staff time and financial resources.

For example, critics of the IMF allege that the required structural adjustments are too politically difficult and too rigorous and that the debts incurred through IMF loans help to create poverty, as capital that could have been invested instead was channeled into debt repayment.

Few previous studies have reported attempts at improvement, and rigorous evaluation is difficult in this field.

As already noted, the difficult taxonomy of the group, and the limited amount of available data and specimens, makes difficult the rigorous assessment of the partition of the measured variation among and within species.

It is perhaps a difficult goal to achieve both patient continuity and rigorous psychometrics using only one examination format.

In the absence of cumulative revision rates and rigorous, continuous analysis, it is difficult to understand the value of new device models and processes.

The Food and Agriculture Organization of the United Nations FAO) Representative in Rwanda, Gualbert Gbehounou, reminded participants of the meeting that eradicating poverty and hunger may be difficult without rigorous community-oriented actions against the Fall Armyworm.

Thirty years ago, it was difficult to claim fealty to jazz and not confront, in one way or another, the intense and rigorous music of Anthony Braxton.

He was methodical, and rigorous.

It's disciplined and rigorous.