| 释义 |
doubt·ful AHD[doutʹfəl] D.J.[ˈdaʊtfəl]K.K.[ˈdaʊtfəl]adj.（形容词）- Subject to or causing doubt:可疑的，令人怀疑的：a doubtful claim; doubtful prospects.令人怀疑的索赔案；令人可疑的前景
- Experiencing or showing doubt:疑惑的，怀疑的：Doubtful that the cord would hold, we strengthened it.绳索恐怕不能支撑，让我们使它坚固一点
- Of uncertain outcome; undecided.不能确定的：未决的；未定的
- Raising doubts as to legitimacy, honesty, or respectability; suspicious:令人质疑的：合法性、诚实性或名声有问题的；不可靠的：the candidate's doubtful past.See Usage Note at doubt 这位候选人过去名声令人质疑 参见 doubt
doubtʹfully adv.（副词）doubtʹfulness n.（名词）doubtful, dubious, questionable- These adjectives express a degree of uncertainty or reservation about someone or something.这些形容词都表示不确定的程度或对某人、某事的异议。
- Doubtful suggests pronounced lack of certainty: Doubtful 表示明显的不确定性： It is doubtful whether she will be admitted to graduate school.她能否考上研究生很可疑。He is an author of doubtful reputation.他是一位名声不太好的作家。
- Dubious expresses uncertainty less directly and less forcefully;often it suggests hesitancy, suspicion, or mistrust: Dubious 表示的不确定性不那么直接和不那么强，通常它含有犹豫不决、猜疑、不信任的意思： dubious about agreeing to go;迟疑不决到底同意还是不同意去；a painting of dubious value.价值没法断定的画。
- Questionable can mean merely open to question ( Questionable 意思是“值得疑问的”：（ Whether this is true is questionable); often, however, it implies dubious morality, respectability, or propriety: 这是不是真的倒成问题）； 然而，它通常暗指道德、名声或行为等的有问题： questionable dealings;不正派的行为；a questionable stockbroker. 不正当的股票经纪人
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