indisputable

1. ADJ If you say that something is indisputable, you are emphasizing that it is true and cannot be shown to be untrue. 無(wú)可爭(zhēng)辯的[強(qiáng)調(diào)]

It is indisputable that birds are harbouring this illness. 無(wú)可爭(zhēng)辯的是，鳥(niǎo)類攜帶著這種疾病。