The phrase "a primary factor that" is correct and usable in written English.
It can be used when discussing the main reasons or elements contributing to a particular outcome or situation.
Example: "A primary factor that influenced the decision was the significant cost savings associated with the new strategy."
Alternatives: "a key element that" or "a major contributor that".
The availability of the selected resources for job execution is a primary factor that determines the computing performance.
However, the low surface areas of the nanowire/nanorod arrays seem to be a primary factor that limits the amount of dye adsorption and hence the conversion efficiency of the cells [25].
This result is in agreement with the findings of Schlenkrich and Sewry (2012), which showed that usability is a primary factor that determines successful usage of SNS in higher educational institutions.
In Pedra Branca do Amapari, on the borders of Venezuela and Guyana, the clustering of Indian reserves is a primary factor that influences the level of social vulnerability, along with extractive industry and migration.
Such discrepancy suggests that aging itself would not be a primary factor that affects fin regeneration.
A primary factor that facilitated our study was a suite of phylogenetic footprinting tools that complemented and cross-validated each other.
As a result, turbine control is the primary factor that determines operation stability, while the fluctuation of wind power is the secondary factor for operation stability.
Therefore, it is strongly indicated that the primary factor that has a great effect on fc is the agglomeration of the Au filler.
Reduction in the amount of food sources or changes in its spatial distribution appears to be the primary factor that has a rapid and long term impact on the size of rat populations [17], [18].
It is obvious that continuous working time (CWT) is the primary factor that affects human reliability in this scenario.
