The phrase "a strong and functional" is correct and usable in written English.
It can be used to describe something that is both robust and effective in its purpose or design.
Example: "The new software is a strong and functional tool for managing our projects efficiently."
Alternatives: "a robust and effective" or "a powerful and practical".
Taken together, Yahoo has managed a strong, and functional refresh of the Web interface of its Finance service, and refresh its iOS experience in a way that easily bests its previous versions.
The US has not spent anything close to adequate efforts to build a strong and functional Iraqi military, and Prime Minister Nouri al-Maliki's policies gave the fragile military he received from the Americans a final push into the abyss.
Linkages to a strong and functional research program like the IDI can provide the context to allow for continued growth beyond the PhD studies and opportunities to mentor [ 8].
A strong and well functional CTD is an prerequisite for TB service decentralisation, because the CTD has to take quality assurance responsibilities [ 12].
The latter corresponds to most of the tissue's dry weight, surrounding all chondrocytes and maintaining a strong structural and functional relationship with these cells [ 2, 3].
When computed for biological objects, the values of a shape characterizer are largely independent of homology interpretations and often contain a strong ecological and functional signal.
Indeed, there is a strong structural and functional interaction among plastid, mitochondrial, and nuclear genomes [ 11, 12].
The ELOVL6 gene is a strong positional and functional candidate gene involved in de novo lipogenesis and acts on the elongation of SFA and MUFA.
Purifying selection was a key mechanism in the evolution of aHEV, suggesting the existence of a strong structural and functional constraint against diversification that would lead to extensive amino acid changes within the 3 ORFs in aHEV strains.
However, the MBL-MASP complex has a strong structural and functional similarity to the C1 complex, thus leading to the interference of the CP involved with the hemolytic MBL assay.
A strong positional and functional candidate for a gene in this region underlying at least one aspect of the Turner syndrome neurocognitive phenotype, and the contrasting pattern in Klinefelter syndrome of verbal deficits but spared visual spatial abilities, has been identified by Vawter et al. (2007).
