A simulated dynamics approach [28] also uses a differential equation, but it is difficult to ascertain whether its solution has converged to the global optimum.
It is increasingly utilized in health professional education; however, it is difficult to ascertain effectiveness.
It is difficult to ascertain how many people are dead or have been rescued.
This long gap is in part why it is difficult to ascertain a link between offending and active service.
Without validation, it is difficult to ascertain if the cutoffs we intend are the ones we actually select.
Liberal use of a redacting black pen means it is difficult to ascertain who was speaking to the police.
It is difficult to ascertain the color of anal cancer, but I believe it is purple/green.
Thereafter they became Romanized so quickly and completely that it is difficult to ascertain their original culture.
As the UAEG does not break down remittance statistics by country, it is difficult to ascertain the total value of funds transferred.
All the major investment banks trade energy products, but it is difficult to ascertain exactly how much they make – most bury the results in their financial statements.
It is difficult to ascertain the exact epidemiology of WHF due to varying definitions used in the literature.
