Sentence examples for this is a difficult problem from inspiring English sources

The walls erected by New York State are unsightly reminders that this is a difficult problem to solve.

And particularly with prosecutors, there's really no penalty at all for going too far to get a guilty verdict.In one regard, this is a difficult problem to fix.

This is a difficult problem for retributivists.

This is a difficult problem, since the linearized operator has a non-trivial kernel.

This is a difficult problem to solve in that it is often an ill-defined problem.

This is a difficult problem because learning of both parameters could easily interfere in a destructive way.

Now this problem is a difficult problem, however — and this is the crucial point for our purposes — the problem is also a quite general problem; it arises because of the paradigm style of definition.

Exactly how to use this information is a difficult problem in which individual judgment plays an important part.

However, determination of this threshold is a difficult problem even for regular topologies.

However, in this approach, there is a difficult problem to cope with: multi-parallel and multistep reactions require the compartmentation of beads.

This information, however, is often encoded in large repositories of images, and developing ways to extract this spatiotemporal expression data is a difficult problem that often uses complex domain-specific methods for each individual data set.