自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
N-VAR 怀疑;疑虑 If you have doubt or doubts about something, you feel uncertain about it and do not know whether it is true or possible. If you say you have no doubt about it, you mean that you are certain it is true.
This raises doubts about the point of advertising...
I had my doubts when she started, but she's getting really good...
VERB 不能肯定;认为…未必可能 If you doubt whether something is true or possible, you believe that it is probably not true or possible.
Others doubted whether that would happen...
He doubted if he would learn anything new from Marie...
VERB 怀疑（某事物的真实性） If you doubt something, you believe that it might not be true or genuine.
No one doubted his ability...
Nobody that I spoke to doubted his sincerity as a politician.
VERB 怀疑，不相信（某人或某人的话） If you doubt someone or doubt their word, you think that they may not be telling the truth.
No one directly involved with the case doubted him...
I still have no reason to doubt his word.
PHRASE 无疑地;确实地 You say that something is beyond doubt or beyond reasonable doubt when you are certain that it is true and it cannot be contradicted or disproved.
A referendum showed beyond doubt that voters wanted independence...
His ability is beyond any doubt.
PHRASE 不能肯定的;拿不准的 If you are in doubt about something, you feel unsure or uncertain about it.
He is in no doubt as to what is needed...
When in doubt, call the doctor.
CONVENTION 我怀疑;我认为不可能 You say I doubt it as a response to a question or statement about something that you think is untrue or unlikely.
'Somebody would have seen her.' — 'I doubt it, not on Monday.'
PHRASE 可疑的;不确定的;不可靠的 If you say that something is in doubt or open to doubt, you consider it to be uncertain or unreliable.
The outcome was still in doubt...
That claim is increasingly open to doubt.
PHRASE 无疑地;必定 You use no doubt to emphasize that something seems certain or very likely to you.
The contract for this will no doubt be widely advertised...
She's a very sweet woman, as you no doubt know by now.
PHRASE 固然;诚然 You use no doubt to indicate that you accept the truth of a particular point, but that you do not consider it is important or contradicts the rest of what you are saying.
No doubt I'm biased, but it was the most cruel, evil human face I ever set eyes on...
No doubt many will regard these as harsh words, but regrettably they are true.
PHRASE 无疑地;确实地 If you say that something is true without doubt or without a doubt, you are emphasizing that it is definitely true.
Without doubt this was the most important relationship I developed at college...
The refugees, without a doubt, are the most vulnerable.