The phrase "an indispensable factor in" is correct and usable in written English.
It can be used to emphasize the importance of a particular element in a process, situation, or outcome.
Example: "Effective communication is an indispensable factor in the success of any team."
Alternatives: "a crucial element in" or "a vital component in".
The Septuagint became the instrument whereby the basic teachings of Judaism were mediated to the pagan world, and it became an indispensable factor in the spread of Christianity.
In short, the United Nations can be an institution that is disconnected from what matters in the lives of our citizens, or it can be an indispensable factor in advancing the interests of the people we serve.
"Far from being the work of mere leeches intent on sucking the life's blood out of indebted families or gambling with the savings of widows and orphans, financial innovation has been an indispensable factor in man's advance from wretched subsistence to the giddy heights of material prosperity that so many people know today," argued Ferguson in The Ascent of Money.
In these, he insists that faith is an indispensable factor in earthly endeavours of all kinds; and that earthly approaches to problems such as the alleviation of suffering, the effective use of resources and care for the environment are likely to fail unless they are informed by belief in God.
So, disease resistance has become an indispensable factor in the study of infectious disease models.
The results showed that SiO2 · HSs could barely be obtained at the above situations, which indicated that rare-earth ion was an indispensable factor in hollow structure formation.
We identified Kaiso (ZBTB33) as an indispensable factor for methylation maintenance in human ICR1 in primary human fibroblasts.
Wang, Z. Y. et al. Axl is not an indispensable factor for Zika virus infection in mice.
Excellent air distribution is an indispensable factor to acquire comfortable environment in high density occupant areas, such as subway stations.
These data indicate that cofilin-1 is an indispensable factor for the integrity of normal podocyte foot processes in zebrafish.
But still, the elevated [Ca2+]i is an indispensable factor to maintain the Cn activity, since mutations resulting in a persistent Cn activation, independent of Ca2+, were never reported.
