Sentence examples for been a persistent challenge from inspiring English sources

"This issue has been a persistent challenge for Pakistan," said a senior American official who deals with South Asia and who spoke on condition of anonymity because of the delicacy of the matter.

Characterizing these patterns in forested ecosystems with remote sensing data has been a persistent challenge as variation in severity may be heterogeneous at fine spatial scales.

However, low protein yield has been a persistent challenge in further development of transgenic plants as a practical recombinant protein production platform.

Newborn mortality has been a persistent challenge, with reductions in neonatal deaths lagging behind declines in post-neonatal child mortality in most low-income countries.

Formulating a good working definition of annoyance is a persistent challenge for researchers.

Upholding such standards is a persistent challenge faced by those who implement and maintain injury surveillance systems.

Measuring crime is a persistent challenge in criminology, and this paper has adopted two measures to increase the robustness of the dependent variable measurement.

The third component we identify is coordination, which is a persistent challenge and polemic in the humanitarian sector (Stephenson 2005; Bisri 2016).

Background: The achievement and maintenance of access sites for hemodialysis is a persistent challenge for both the vascular surgeon and the clinical nephrologist.

Diagnosing zinc deficiency is a persistent challenge.

That's a persistent challenge that we face.