Dudoso (en. Dubious)

Translation into Spanish

Military training exercises staged in May 1900 revealed that the Victoria Lines were of dubious defensive value.
Los ejercicios de entrenamiento militar organizados en mayo de 1900 revelaron que las Líneas Victoria tenían un dudoso valor defensivo.
Example taken from data source: wikimedia_v20210402
And when the book came out, I was heralded as Africa's answer to Frederick Forsyth, which is a dubious honor at best.
Y cuando salió el libro, yo fui anunciado como la respuesta africana a Frederick Forsyth que, en el mejor de los casos, es un honor dudoso.
Example taken from data source: TED2020_v1
Holding the interview in semi-directed form allows the researcher the immediate understanding of the information, clarification of dubious questions and adequacies in the course of the interview.
Conducir la entrevista de forma semidirigida le permite al investigador comprender inmediatamente las informaciones, esclarecer asuntos dudosos y adecuar el curso de la entrevista.
Example taken from data source: SciELO_v1
Furthermore, poor agricultural infrastructure, dubious land-use patterns and lack of agricultural credit and capital inputs hamper labour productivity, income levels and seriously undermine the sector's capacity for market integration.
Agricultural infrastructure, dubious land-use patterns and lack of agricultural credit and capital inputs hamper labour productivity, income levels and seriously undermine the sector's capacity for market integration.
Example taken from data source: MultiUN_v1
The downside of this abundant fossil record, say the researchers, is that many dubious fossil equid taxa have been erected, a problem especially acute within Pleistocene Equus of North America.
La desventaja de este enorme registro fósil, en opinión de los investigadores, es que se han generado muchos taxones dudosos de équidos fósiles, un problema especialmente importante en los Equus del Pleistoceno en Norteamérica.
Example taken from data source: ELRC-CORDIS_News_v1
A dubious distinction, but, uh, yes.
Una distinción dudosa, pero, sí.
Example taken from data source: OpenSubtitles_v2018
But he also noted that such estimates depend on many dubious assumptions.
Pero también señaló que estas estimaciones dependen de muchos supuestos dudosos.
Example taken from data source: Wikipedia_v1.0