Dubious 的意思是令人怀疑的、可疑的。（形容词）

The independent media in Russia are facing tough challenges after authorities in Moscow accused a prominent investigative journalist of producing and trafficking drugs, using what observers say was dubious evidence.

俄罗斯独立媒体正面临严峻挑战，之前莫斯科当局以观察家们所称的令人怀疑的证据指控一位著名的调查新闻记者制造和贩卖毒品。

Internal Facebook emails, which were uncovered as part of the ongoing federal probe into the platform's privacy violations, appear to show that CEO Mark Zuckerberg was aware of the dubious practices, according to The Wall Street Journal.

据 “华尔街日报”报道，联邦政府在对脸书公司侵犯隐私权问题所做的调查中发现的内部电子邮件似乎表明，公司首席执行官扎克伯格已经了解公司这些令人生疑的做法。

出处：头条号 @学点英语口语