1. The main or most important contribution made by a person or entity to a project, organization, or field of study
Her primary contribution to the research was the development of the new methodology.
Sua contribuição primária para a pesquisa foi o desenvolvimento da nova metodologia.
2. The principal or fundamental input or effort that forms the basis of an achievement or result
The primary contribution of this study is demonstrating the effectiveness of the treatment.
A contribuição primária deste estudo é demonstrar a eficácia do tratamento.