For many 'green designs', the usual problem is that they have a low current value/costs ratio.

There was the usual problem: what to take along for the field marshal's lunch.

A problem that's come your way and it isn't the usual problems that you can quickly find an answer to.

The usual problem with distributed generators are their high costs.

It deals with the usual problems of politics, violence and vengeance.

For a little while it would be fine, and then they'd just go back to their usual problems.

I suspect it is the usual problem, that one must feel her life to somehow be threatened.

There are two problems: first the usual problem in these countries, that is, agriculture.

A more usual problem is whether to tell those events now, or to pause to fill in background.