han corroborado
Present perfectellos/ellas/ustedesconjugation ofcorroborar.

corroborar

Obsérvese que las semividas previstas no se han corroborado empíricamente, pero se proporcionan con fines de referencia.
Note that predicted half-lives have not been empirically substantiated, but are provided for reference purposes.
Esas acusaciones contra trabajadores humanitarios no se han corroborado.
These charges against humanitarian workers have not been substantiated.
Se ha establecido la superioridad de Génesis 1-11, y se han corroborado los trasfondos históricos de los patriarcas.
The superiority of Genesis 1–11 has been established, and the patriarchal backgrounds have been endorsed.
Las conclusiones de Human Rights Watch no se han obtenido ni científica ni objetivamente, ni se han corroborado de manera independiente.
The findings of Human Rights Watch are neither scientifically and objectively obtained nor independently substantiated.
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