The phrase "a formidable challenge that" is correct and usable in written English.
It can be used when describing a significant difficulty or obstacle that needs to be overcome in a particular context.
Example: "The project presented a formidable challenge that required innovative solutions and teamwork to succeed."
Alternatives: "a significant obstacle that" or "a tough hurdle that".
Restoring self-sustaining tropical forest ecosystems on surface mined sites is a formidable challenge that requires the integration of proven reclamation techniques and reforestation strategies appropriate to specific site conditions, including landscape biodiversity patterns.
"Africa's youth present a formidable challenge that requires careful interventions".
Intratumour heterogeneity is a formidable challenge that must be addressed in the development of personalised medicine and biomarker development.
In order to determine the structure, the authors had to overcome a formidable challenge that arises due to the mismatch between the four-fold symmetry in the channel and the lack of symmetry in the toxin.
Unraveling the mechanisms that unify disparate cellular elements into a single functional system such as the eyespot is a formidable challenge that has been assisted by forward genetic approaches.
It is such a formidable challenge that some have argued "[t]o date, an example of a vibrant and successful merger of academic health centers remains to be found" [ 25].
Mr. Orszag, the budget office's director, told a group of business leaders in November that he was committed to reaching 3 percent of the gross domestic product by 2015, a formidable challenge since that is nearly a full percentage point below current administration projections for that year.
An integrated intervention addressing multiple risks simultaneously can be implemented in a prenatal, primary care clinic setting, although there were formidable challenges that required both skill and flexibility in delivery.
Concerns with validity in audio tests, technical difficulties in the delivery of audio, and general stigma associated with the use of assistive technology and accommodations present formidable challenges that must be met before the full potential of audio assistive technology can be realised.
Sally Osberg: Well, it's hard not to be overwhelmed by the scale and complexity of the challenges confronting us all, whether it's geopolitical instability, climate change, resource depletion, food security, disease, and the deep misery of poverty: these are truly formidable challenges that affect us all.
These observations illustrate the formidable challenges that remain to be addressed in the functional analysis of the genomes of filamentous fungi.
