Sentence examples for on a tough problem from inspiring English sources

MacMillan and postdoctoral researcher David Nicewicz were working on a tough problem.

As most of us know, if we concentrate too intensively on a tough problem, we can get stuck in a mental rut.

At JPL she worked on a tough problem facing users of massive data sets: limited software to make sense of it all.

The latest U.S. economic news was Monday-morning blah: data on construction and manufacturing, two labor-intensive industries, showed recessionary pressures have not abated, givng whoever wins the presidential election on Tuesday a tough problem to deal with even before his term begins in January.

South had a tough problem on the first round of the bidding.

A new website is tackling a tough problem: searching for songs based on hums.

The bulb makers face a tough problem.

It's a tough problem, dealing with human predators.

It's a tough problem.

Facebook is strapped with a tough problem.

That is a tougher problem.