The phrase "acknowledged to be complex" is correct and usable in written English.
It can be used when discussing a subject or issue that is recognized as having multiple layers or difficulties.
Example: "The problem of climate change is acknowledged to be complex, involving various scientific, economic, and social factors."
Alternatives: "recognized as intricate" or "accepted as complicated."
Functional impairment in the fast-growing population of the frail elderly is generally acknowledged to be a complex issue in an urgent need of comprehensive addressing.
One result, Dimock and Gilmore imply, is that class is acknowledged to be a relationship both complex and complexly experienced.
Thomas H. Kean, the former New Jersey governor who has been the school's president for 15 years, a post he will be relinquishing this summer, is generally acknowledged to be the driving force behind the complex that houses the concert hall, the 83,000-square-foot Dorothy Young Center for the Arts.
A recent Scottish government review of the links between off-sales outlets, excessive underage drinking and alcohol-related trouble acknowledges such relation ships are likely to be complex and non-direct, but concludes that researchers outside North America may have 'missed' the importance of alcohol outlets as a major influence on alcohol consumption (Pattoni et al., 2007).
They acknowledged this was complex information to convey, which needed to be well-timed and appropriately tailored for each individual, although there was a clear pattern that emerged between clinical and community-based service providers.
EPR and telemedicine implementations are widely acknowledged as being complex and contingent areas of technology-enabled service innovation [ 5, 6].
Despite relatively high prevalence of mitochondrial disorders, it is widely acknowledged that they are complex diseases to make a definite clinical diagnosis if based on clinical presentations exclusively [ 3].
We were further limited by concentrating on family-focused adversities and acknowledge that there may be complex external factors which need to be explored.
They forge relationships that acknowledge that children are complex beings; they see and address students' needs and possibilities.
They acknowledged that many polymorphisms may be complex and difficult to resolve using short-read sequencing data [ 23].
