The phrase "a decisive role on" is not correct; it should be "a decisive role in." You can use it when discussing the importance or influence of someone or something in a particular situation or context.
Example: "The new policy played a decisive role in improving employee morale."
Alternatives: "a crucial role in" or "a significant role in".
As mentioned previously, the prestress of rock bolts is one of the key parameters for bolting, and plays a decisive role on the effect of anchor support.
"WHEN it chooses to pursue a truly federal policy, the EU can play a decisive role on the world stage.
Gov. George W. Bush of Texas, the presumptive Republican presidential nominee, could play a decisive role on the plan at the convention.
"I believe that my recommendations strike the right balance between preserving the vital role of the House of Lords in scrutinising legislation, and enabling the elected House of Commons to have a decisive role on statutory instruments".
The governor, a Democrat now in her second and final term, had said that she did not believe that the state was ready for same-sex marriage and that churches should play a decisive role on the issue.
We find that the morphology of conductive agent plays a decisive role on electrochemical performances.
Thus, our study confirms and extends previous reports on a decisive role of gap junctional communication on augmentation of apoptosis in tumour cell lines such as BC31 (a rat bladder carcinoma cell line) or C6 glioma cells, as well as in neuronal cells, for example, astrocytes and Neuro2a cells.
Accumulating evidence demonstrates a decisive role of the environment on the manifestations of EAE in genetically susceptible animals.
Regardless receptor dependent or not, the agonist-induced vasorelaxation was quantitatively correlated with EC [Ca2+]i level in rat aorta, suggesting a decisive role of EC [Ca2+]i signaling on vasorelaxation.
However, there is a consensus in the literature that the architect has a decisive role to play in helping to reduce waste by focussing on designing out waste.
However, that alliance plays a decisive role for social change.
