The phrase "important role which" is correct and usable in written English.
It can be used when describing the significance of a role in a particular context or situation.
Example: "The teacher plays an important role which influences the students' learning experience."
Alternatives: "crucial role that" or "significant role that."
And we need to make sure they have the arms they need to carry out the very important role, which is getting rid of Assad.
"It is time to recognise the important role which the global shipping industry must play in holding global temperatures well below 2C," the coalition told the UN's International Maritime Organisation IMOO).
The impact on climate change is already being felt.Among rural people, those who live and work on the world's 500m smallholder farms play an important role, which must be strengthened and expanded.
The term "collaborative pianist" is now often used instead of "accompanist" as a more fitting description of this important role, which seemed particularly vivid during a recital by the baritone Christian Gerhaher and the pianist Andras Schiff at Zankel Hall on Saturday evening.
Hence, during boriding of Nimonic®80A-alloy volume diffusion plays the more important role, which requires the high activation energy.
"It is an important role which I take seriously and one to which I will bring extensive experience.
The results suggest that the indirect effects through activity participation decision play important roles, which may reinforce the direct effects of land use patterns on travel behavior.
These results show that the protagonist of this movie has the highest value of centrality and he/she holds the important roles which show that Luke Skywalker had the highest values.
In addition, overexpression of OsPYL3 and OsPYL9 in the absence of ABA significantly delayed seed germination, and OsPYL9 played more important roles, which was consistent with the upregulation of OsPYL9 in the embryo compared to that of OsPYL9 (Fig. 5c-i).
A conclusion from the sensitivity analysis is that the inception process, the molecular growth process by aromatic addition on particle nuclei, and surface addition of C2H2 all play important roles which need to be studied in greater detail to predict the right size distribution and volume fraction of particulates formed in flames.
While their primary role is to generate ATP, mitochondria also play a number of important roles which affect cell survival and death (Pellegrini and Scorrano, 2007).
