Experts say Rasmussen's is particularly intractable to treatment.

Keeping the entire family attending meetings can be a continuing problem, particularly if progress is slow, or problems are particularly intractable.

Book provision generates some particularly intractable management problems, especially in the area of quality control of work carried out.

High-performance games come with particularly intractable problems.

The QL becomes particularly intractable when dealing with so many large variables.

The Ukraine posed particularly intractable problems for Petrograd.

What makes the situation particularly intractable is that there are issues that were never resolved at independence and which have continued to fester ever since.

Air pollution is a particularly intractable problem which needs to be tackled using an integrated, systematic and multidisciplinary approach.

These problems arise with both case studies and more general surveys, and are particularly intractable when the appropriate control group is in another country.

This makes the problem particularly intractable, as qualified persons may remain unemployed simply because they are not an ideal fit for the trailing department.