"the candidate's doubtful past"
"he has a dubious record indeed"
"what one found uncertain the other found dubious or downright false"
"it was more than dubitable whether the friend was as influential as she thought"
fraught with uncertainty or doubt;
"they were doubtful that the cord would hold"
"it was doubtful whether she would be admitted"
"dubious about agreeing to go"
unsettled in mind or opinion;
"drew a few tentative conclusions"
doubtful的用法和样例：
例句
用作形容词 (adj.)
It is doubtful whether it is true or not. 这件事的真假是可疑的。
The fact that he won the first place is doubtful. 他得了第一名是让人可疑的。
He is an author of doubtful reputation. 他是一位名声不太好的作家。
The ethics of his decision are doubtful. 他的这一决定是否合乎道德规范值得怀疑。
I am doubtful about the propriety of granting such a request. 我怀疑答应这项要求是否合适。
It is doubtful whether the old man will recover from the operation. 那老人手术后是否会康复难以确定。
沪公网安备 31011502000490号
电信业务许可证编号：沪B2-20190700
