Sentence examples for difficult to establish precisely from inspiring English sources

One of the intervals that are difficult to measure is the patient interval (i.e. the period from the patient's first symptom until the first presentation to the health care system) because dates of symptom onset and first presentation are difficult to establish precisely.

Therefore, it is difficult to establish precisely the silver content of the composites by TGA.

We depend heavily on the professional skills of the historian to establish precisely what happened.

However, further work is needed to establish precisely what step or steps are affected.

This is difficult to establish.

Causality is always difficult to establish.

The truth of this is somewhat difficult to establish.

Coöperation is difficult to establish and almost as difficult to sustain.

A formal mechanism proved difficult to establish.

Trends over time were difficult to establish.

That has made it difficult to establish a national figure.