undisputable

她获奖是因为她出色的表现，这已是无可争辩的事实。

Her award was for excellent performance, a fact that is ___undisputable.

这项研究的结论无可争辩，彻底改变了我们对这一疾病的看法。

The study's conclusion is ___undisputable and has changed how we view the disease.

他对团队的贡献无可争辩，因为他总是第一个完成最难的任务。

His contribution to the team is ___undisputable, as he always finishes the hardest tasks first.