| 释义 |
doubt·ful /ˈdaʊtfʊl/
a.
1. 疑惑的；怀疑的(about, of)
I feel doubtful (about) what I ought to do. 我不知该干什么。
I am doubtful of the wisdom of your plan. 我对你的计划是否明智有怀疑。
She is doubtful whether he is still alive. 她怀疑他是否还活着。
2. 可怀疑的，令人生疑的
Any theory that has not been tested is at best a doubtful thing. 任何未经检验的理论至多不过是一种可疑的理论。
I think the manuscript is of doubtful authenticity. 我认为手稿的真实性值得怀疑。
It is doubtful that they ever knew what happened. 看来他们未必知道所发生的事。
3. 含糊不清的；不明确的
The meaning is doubtful. 意思含糊不清。
a doubtful answer 不明确的回答
4. 难以预测的；未决的，未定的
The future looks very doubtful. 前途看上去难以预测。
The outcome of his appeal is still doubtful. 他上诉的结果仍悬而未定。
5. (名声、价值等)不太好的，坏的；有问题的，不可靠的
a doubtful reputation 不太好的名声
a book of doubtful merit 质量有问题的书
a man with a doubtful past 历史可疑的人
There's a doubtful character looking in the windows of their house. 有一个可疑的人朝他们家的窗子里张望。
a doubtful ally 不可靠的盟友
6. 未必的，不大可能的
It is doubtful whether this will work. 这一着能否奏效说不定。
The agreement seemed doubtful of achievement. 看来协议不大可能达成。
7. 迟疑的，犹豫的
He was doubtful about which plane to take. 他犹豫不决，不知该乘哪架飞机。
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