The phrase "and has contributed a" is correct and usable in written English.
It can be used when discussing someone's involvement or input in a project, organization, or field of study.
Example: "She has worked on numerous research projects and has contributed a significant amount of data to the study."
Alternatives: "and has made a contribution to" or "and has added a".
He had three assists and has contributed a great deal in the Islanders' seven victories in their last 13 games.
Jeffrey Seller, who was a producer of "Heights," and has contributed a million dollars to the production costs of "Hamilton," says, "No one wants to listen to hip-hop all night, and we are not going to give it to them all night.
Though some detection process of their experiments could only take place in solution, their excellent work is a useful reference for graphene-based gas detection and has contributed a lot to practical applications in national defense and daily life.
The genomic organization of LWS opsins has also been described in mammals and has contributed a great deal to the understanding of their evolution and function [ 35- 38].
But they are working on it, and have contributed a few hundred peacekeepers to NATO forces in the former Yugoslavia.
Later, the 2002 reform allowed for early retirement at 61 for those workers that had not contributed before 1967 and had contributed a minimum of 30 years.
They claim to run one of the largest MySQL instances on the planet, and have contributed a number of patches to various open source projects.
"The team has done very well and De Gea has contributed a big part of that," Van Gaal said.
LISA KAHLDEN: The eclectic use of music in film and television has contributed a lot, I think, to the sense that it is natural to "like everything".
But he is also an accomplished guitarist, and he has contributed a huge number of inspired works to his instrument's repertory.
She contributes her services on these occasions, and she also has contributed a good many garter belts, which she tosses to the audiences.
