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Merriam-Webster's Advanced Learner's Dictionary

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doubt

6 ENTRIES FOUND:

¹ doubt /ˈdaʊt/ verb

doubts; doubted; doubting

¹ doubt

/ˈdaʊt/

verb

doubts; doubted; doubting

Learner's definition of DOUBT

[+ object]

: to be uncertain about (something) : to believe that (something) may not be true or is unlikely怀疑；不确定

She began to doubt [=question] everything he said.她开始怀疑他说的一切。
I have always doubted the existence of life on other planets.我一直对外星生物的存在持有怀疑。
No one doubts that the mission will be a success.所有人都认为这项任务将会成功。
I seriously doubt my parents will let me go.我非常怀疑我父母是否会让我去。
“Do you think you can come tonight?” “I doubt it.”“你今晚能来吗？”“我不确定。

: to have no confidence in (someone or something)对…没有信心

I began to doubt [=question] my own judgment.我开始怀疑自己的判断力。
She doubted his ability to succeed.她不能肯定他是否有能力取得成功。
He said he could do it, but I couldn't help doubting him.他说他能做，但我还是忍不住怀疑他。

— doubter

noun, plural doubters [count]

He did everything he could to reassure the doubters.他尽其所能来消除怀疑者的疑虑。

² doubt /ˈdaʊt/ noun

plural doubts

² doubt

/ˈdaʊt/

noun

plural doubts

Learner's definition of DOUBT

: a feeling of being uncertain or unsure about something疑问；疑虑；不确定

[noncount]

I still have moments of doubt.有时我仍然会心存疑虑。
There can be little doubt that smoking is bad for your health.毫无疑问吸烟有害健康。
There is no doubt [=question] in my mind that he is the best candidate.我深信他是最佳候选人。
These mistakes cast/throw doubt on her ability. = They cast/throw into doubt her ability. [=they make people question or lose confidence in her ability]这些错误使人们对她的能力产生了怀疑。
(US) The results of the study have been called into doubt. [=people are expressing doubts about the results]研究结果受到了质疑。

— often + about

She was filled with doubt [=uncertainty] about the future.她对未来充满疑惑。
The evidence against her leaves little room for doubt about her guilt. [=the evidence shows that she is guilty]对她不利的证据确定无疑地表明她有罪。

[count]

I had a nagging doubt in the back of my mind.当时我的脑海深处有挥之不去的疑惑。

— often + about

He still has doubts about his chances of success.他对自己是否有机会获得成功仍然持怀疑态度。
I've always had my doubts about him.我一直不太相信他。
Two separate studies have raised doubts about the car's safety.两项独立的研究对这辆车的安全性提出了质疑。

beyond doubt

◊ If something is beyond doubt, it is definitely true.毋庸置疑的

The test results proved beyond (all/any) doubt that he was not the child's father.检验结果确切无疑地证实了他不是这孩子的父亲。
If she is to be found guilty, the charges against her must be proved beyond a reasonable doubt.如果要判她有罪，必须要证明对她的控告是确切无疑的。
I knew, beyond a shadow of a doubt, that everything was going to be okay.当时我确凿地知道，一切都会好起来的。

in doubt

: in a state of being uncertain or unsure不确定的；拿不准的

The outcome was in doubt [=not known with certainty] until the final seconds of the game.不到最后时刻，比赛的结果都还是未知数。
The future of the company remains very much in doubt.公司的前景仍然很不明朗。
When/if in doubt, please contact us with your questions.如有疑问，请联系我们。

no doubt

: without doubt or with very little doubt — used when you are making a statement that you think is certainly or almost certainly true毫无疑问（用于陈述确定的事实）

She was no doubt [=certainly, doubtless, unquestionably] the smartest person in her class.她无疑是班上最聪明的人。
No doubt many readers will find the book too long.毫无疑问很多读者会认为这本书太长了。
By now, you have no doubt heard the news.到现在你肯定已经听说这个消息了。
“He'll probably blame someone else.” “No doubt.” [=I agree that he'll blame someone else]“他很可能会埋怨别人。”“肯定会的。”

no doubt about it

— used to stress that something is true毫无疑问（用于强调某事的真实性）

No doubt about it, the fans are disappointed in the team.毫无疑问，球迷们对这个队很失望。

the benefit of the doubt

— see ¹benefit

without (a) doubt