英语听力课堂(www.tingclass.net)是公益性质的英语学习网站，您可以在线学习英语听力和英语口语等,请帮助我们多多宣传，谢谢！
/ˈdʒuː.bi.əs/
thought not to be completely true or not able to be trusted
半信半疑的，可疑的;不确定的;不可信的
These claims are dubious and not scientifically proven.
这些说法未经科学证实，有些可疑。
She knew he really wanted to help her; however, she was dubious about his ability to help.
她知道他是真心想帮她，但对他有没有那种能力却半信半疑。