Sentence examples for be very difficult to ascertain from inspiring English sources

Emile Schrijver, the current curator of the Bibliotheca Rosenthaliana — whose collection was successfully returned to Amsterdam, via Offenbach, after the war — said that it can be very difficult to ascertain the true history of a particular book.

It still remains unknown, and it will be very difficult to ascertain, whether many of the most prolific grunters intentionally grunt to interfere with their opponent's performance.

However, with the uncertainty about the true source population for the Heligoland mice, this would be very difficult to ascertain.

However, findings relating to the onset of injury need to be viewed with caution as it may be very difficult to ascertain the onset of WRMDs without a substantial recall bias.

Even if the observed contact structure was different than prior to the AI outbreaks, it would be very difficult to ascertain whether this change was due to the impact of the disease, the control measure or pure changes in the trading behaviour caused by other reasons unaccounted for in this study (e.g. market value, changes in production).

Radiation toxicity can sometimes be very difficult to ascertain in patients with GBM for two reasons: the short median survival is probably not long enough for late radiotherapy toxicity to become apparent in many of these patients; and these tumors are associated with large areas of necrosis, which may be mistaken for radiotherapy damage on imaging studies.

"There is no objective test for backache so it's very difficult to ascertain its seriousness," explains Dr Levinson.

In any event, just from video images and photographs it is very difficult to ascertain exactly what the cause of such an incident would have been.

It is very difficult to ascertain when tattooing came about in human culture because there are few written records and scientists must instead look at the archaeological record.

However, this requirement of certainty is where verbal contracts invariable encounter difficulties when a dispute between the parties has arisen, since those terms are very difficult to ascertain.

The full death toll from the violence is very difficult to ascertain: medical staff are under instructions not to disclose information, and security forces routinely dispose of bodies secretly, local human rights officials and activists say.