The phrase "an added difficulty was" is correct and usable in written English.
It can be used to introduce a challenge or obstacle that has been encountered in a situation or context.
Example: "In the project, an added difficulty was the lack of resources, which hindered our progress."
Alternatives: "a further challenge was" or "an additional obstacle was".
Added difficulty was the very similar compositions of water samples extracted from different aquifer layers.
In France, the response to the added difficulty is to give single mothers preferential access to excellent day care.
Finally, as postulated in a study with people with spinal cord injury [ 35], people facing barriers may, with added difficulty, be able to overcome them (participation) but that the experience of encountering barriers may reduce QOL.
As if these men didn't put enough obstacles in her path, there's an added difficulty: Selena knows that even though she'll be using the most sophisticated instruments of the day to guide her to the eclipse, she may "still miss the area of maximum shadow by as much as 40 miles".
In a third world country where the patients are poor, uneducated coming from far and remote areas with limited medical facilities, there is an added difficulty in management of the drains away from the hospital.
The high degree of parallelism or convergence in these modifications has always been an added difficulty to reveal phylogenetic relationships among the subterranean species [ 5- 8], but at the same time poses a very interesting evolutionary problem, as the mechanisms through which it is achieved remain largely unknown.
So if one were to decide to use such materials, there would be another boost to cost, along with an added difficulty for industry to deal with.
Being a single mother was also mentioned by a number of participants as an added difficulty for women.
Such noise around popular conversations may present an added difficulty for the early detection task.
