If you say that something is questionable, you mean that it is not completely honest, reasonable, or acceptable.
例句
He has been dogged by allegations of questionable business practices...他一直被那些指控他有不正当商业行为的说法所困扰。It is questionable whether the expenditure on this project is really justified...该项目的开支是否真的合理还未可知。
英汉词典释义
adj.
可疑的;有疑问的
Your argument is based on a set of questionable assumptions.你的论证建立在一套有问题的假设上。Their motives for undertaking this study are highly questionable.他们承担这项研究的动机大有问题。
英英词典释义
Adjective
1. subject to question;
"questionable motives""a questionable reputation""a fire of questionable origin"