It is difficult to differentiate between T-LGL leukemia and reactive T-LGL proliferations, especially in autoimmune diseases.
It is difficult to differentiate between animal sacrifices and the immediate cultic veneration of an animal at the burial sites of animals.
Mr. Bakaly's role in the investigation will make it even more difficult to differentiate between the truth and the spin.
As the Aug. 15 deadline approached, it was difficult to differentiate between credible threats and high-stakes bargaining.
It has been difficult to differentiate between the two because of the low resolution of many ice-core records.
But as her daughters frequently are in the same role, it is difficult to differentiate between them.
"It is difficult to differentiate between a church and any other place that is set up for entertainment, or what they call in their language, 'fun,' " he wrote.
But it can sometimes be difficult to differentiate between a militant act, street art, vandalism and madness.
Putting aside the obvious cases, it's often to difficult to differentiate between these types of trades.
