1. 懷疑;疑慮
    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.

doubt是什么意思

    e.g. This raises doubts about the point of advertising...
           這對做廣告的意義提出了疑問。
    e.g. I had my doubts when she started, but she's getting really good...
           她剛開始做時(shí)我心存疑慮，但她真的做得很好。

2. 不能肯定;認(rèn)為…未必可能
    If you doubt whether something is true or possible, you believe that it is probably not true or possible.

doubt

    e.g. Others doubted whether that would happen...
           其他人認(rèn)為那未必會發(fā)生。
    e.g. He doubted if he would learn anything new from Marie...
           他認(rèn)為他不太可能從瑪麗那兒學(xué)到任何新東西。

3. 懷疑（某事物的真實(shí)性）
    If you doubt something, you believe that it might not be true or genuine.

    e.g. No one doubted his ability...
           沒有人懷疑他的能力。
    e.g. Nobody that I spoke to doubted his sincerity as a politician.
           和我談過話的人中沒有一個(gè)懷疑他作為一個(gè)政治家的誠意。

4. 懷疑，不相信（某人或某人的話）
    If you doubt someone or doubt their word, you think that they may not be telling the truth.

    e.g. No one directly involved with the case doubted him...
           與此案直接相關(guān)的人中沒有人懷疑他。
    e.g. I still have no reason to doubt his word.
           我還是沒有理由懷疑他的話。

5. 無疑地;確實(shí)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.

    e.g. A referendum showed beyond doubt that voters wanted independence...
           全民公決無疑顯示選民支持獨(dú)立。
    e.g. His ability is beyond any doubt.
           他的能力毋庸置疑。

6. 不能肯定的;拿不準(zhǔn)的
    If you are in doubt about something, you feel unsure or uncertain about it.

    e.g. He is in no doubt as to what is needed...
           他很確定需要什么。
    e.g. When in doubt, call the doctor.
           如有疑問，請聯(lián)系醫(yī)生。

7. 我懷疑;我認(rèn)為不可能
    You say I doubt it as a response to a question or statement about something that you think is untrue or unlikely.

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    e.g. 'Somebody would have seen her.' — 'I doubt it, not on Monday.'
           “可能有人見過她?！薄拔艺J(rèn)為不可能，不可能在星期一?！?/p>

8. 可疑的;不確定的;不可靠的
    If you say that something is in doubt or open to doubt, you consider it to be uncertain or unreliable.

    e.g. The outcome was still in doubt...
           結(jié)果仍不確定。
    e.g. That claim is increasingly open to doubt.
           那一說法越來越可疑。

9. 無疑地;必定
    You use no doubt to emphasize that something seems certain or very likely to you.

    e.g. The contract for this will no doubt be widely advertised...
           關(guān)于這個(gè)的合約無疑會受到廣泛宣傳。
    e.g. She's a very sweet woman, as you no doubt know by now.
           她是一個(gè)非常溫柔的女人，你現(xiàn)在肯定知道了。

10. 固然;誠然
    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.

    e.g. No doubt I'm biased, but it was the most cruel, evil human face I ever set eyes on...
           我固然是有偏見的，但那是我所見到的最殘忍、最邪惡的人。
    e.g. No doubt many will regard these as harsh words, but regrettably they are true.
           固然會有很多人認(rèn)為這些話過于刻薄，但是遺憾的是這些都是真話。

11. 無疑地;確實(shí)地
      If you say that something is true without doubt or without a doubt, you are emphasizing that it is definitely true.

doubt

      e.g. Without doubt this was the most important relationship I developed at college...
             這無疑是我在大學(xué)時(shí)期建立的最重要的關(guān)系了。
      e.g. The refugees, without a doubt, are the most vulnerable.
             難民無疑是最易受到傷害的。

12. the benefit of the doubt -> see benefit
      a shadow of a doubt -> see shadow