The conclusions that they come to are highly questionable.

他们得出的结论大有问题。

《牛津词典》

The facts given by the witness are highly questionable.

证人陈述的事实非常可疑。

youdao

Their motives for undertaking this study are highly questionable.

他们承担这项研究的动机大有问题。

youdao

That kind of revising of the context of a quote is highly questionable journalism.

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His hospitals offer conventional treatments but also sell highly questionable, unscientific treatments to vulnerable patients.

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But to unleash an avalanche of charges to coerce a plea to a lesser-included offense is highly questionable.

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