The phrase "an extra difficulty" is correct and usable in written English.
It can be used when referring to an additional challenge or obstacle that complicates a situation.
Example: "The unexpected weather conditions presented an extra difficulty for the hikers trying to reach the summit."
Alternatives: "an additional challenge" or "a further obstacle."
Since most provinces are run by Peronists, that would be an extra difficulty for Mr de la Rua.Nor can the new government rely on more revenue to plug its fiscal hole.
The non-conservative terms that appear in systems of conservation laws introduce an extra difficulty in practical application.
The different nature of the value to predict poses an extra difficulty that explains the low number of articles on the subject of instance selection for regression.
Additional content was added to the North American release that was absent in the initial Japanese release: new optional bosses, one of which was named after the winner of the official website's "Name-In-Game" sweepstakes, an extra difficulty level, and a teaser of Kingdom Hearts II accessible by meeting certain criteria.
The changes in pharmaceutical presentations may mean an extra difficulty since they often suffer from visual deficiencies, and even cognitive ones, which can increase the risk of mistakes [ 9].
An extra difficulty for working-class students and faculty is that they must learn to straddle two different worlds, says Peter Mather, an associate professor in counseling and higher education at Ohio University in Athens, who supervised a Ph.D. dissertation on the subject, Exploring the Pathways to the Professoriate Taken by First Generation College Students, written by James Lester.
He insisted that strains with Turkey had been smoothed over and would not represent any extra difficulty as he tried to make the miserable Turkish-Greek relationship work inside NATO.
Besides the methods developed directly for delay dynamic equations, there are also some proof procedures utilised originally either for delay differential or difference equations, but they seem to be applicable without any extra difficulties also to a general dynamic case (see, e.g. [6] and [7]).
The whole trilogy – Drake's Fortune, Among Thieves and Drake's Deception – has been brought up to full HD and bundled together with a few bonus features, including a speed-run mode and extra difficulty settings.
The full version will feature a number of exclusive content for the Windows-based PC including, Turbo Mode, which will turn-up the action to insane speeds, and Legendary Dark Knight Mode, which will harness advanced Windows-based PC processing power and fill the screen with an unbelievable number of enemies for extra difficulty.
This adds an extra interpretational difficulty to many analyses of genotype environment interaction that do not carefully explore the degree to which transformations of the scale of measurement can make the interactions disappear.
