The phrase "are not only contributing" is correct and usable in written English.
It can be used when discussing multiple contributions or actions that go beyond a single aspect, often in a comparative context.
Example: "The researchers are not only contributing to the field of science but also inspiring future generations of scientists."
Alternatives: "are also contributing" or "are making significant contributions".
"The chancellor's policies are not only contributing to climate change, they're also undermining our economic future by keeping the nation hooked on increasingly expensive fossil fuels.
"These women are not only contributing to the science and technology development of the Kingdom, they are changing the country as we speak," says Anderson.
So parents, shopkeepers and others in the local community are not only contributing plastic pop bottles to build a greenhouse for the school allotment; they're also chipping in to those fundraising events to help build a classroom for a school in Gambia.
SFL places importance on descriptions that are not only contributing to intellectual findings on language typology but also descriptions that are comprehensive enough to provide useful language material for the application in critical contexts of the community life of the language users, such as education, translation, computational applications, forensic applications, and discourse analysis.
When millennials -- rich with creative talent -- exercise their skills to further a cause they care about, they are not only contributing social impact, but they are developing their own skills and portfolios.
However, chemoheterotrophs are not only contributing to the weathering of rock.
Therefore, we conclude that all atToc159 isoforms are not only contributed to the import of photosynthetic/non-photosynthetic related proteins during vegetative growth, but also modulate reproductive growth.
Tobacco leaf farming in Lombok, Indonesia, was not only contributing to deforestation but also to declining water supply on the island.
The findings in this study will help us to understand the underlying mechanism of HI which is not only contributing to precisely regulating the HIR in maize breeding programs but also to understanding the nature of HI in other species.
