This fundamental difficulty is referred to as the inverse problem.

But perhaps the most fundamental difficulty was a threat to capitalist control on the shop floor.

Teaching physics first in high school presents some fundamental difficulties.

The conference postponed dealing with fundamental difficulties like these for at least a year.

But even if they are overcome, other more fundamental difficulties will remain.

But even if the French vote yes, industry in Sweden will still face fundamental difficulties.

The pair of them had become better friends than ever since she fixed the celestonaut's fundamental difficulty.

In this respect fundamental difficulties for the Germans showed up, which were also characteristic of later actions.

We're so concerned with economic questions that we've forgotten about these fundamental difficulties.

A fundamental difficulty will always remain that of substantiating the complaint.