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VERB
相信；认为
If you believe that something is true, you think that it is true, but you are not sure.
例句
Experts believe that the coming drought will be extensive...
专家们认为即将发生的旱灾将侵袭大片地区。
I believe you have something of mine...
我想你拿了我什么东西。
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VERB
相信（某人或某人的话）
If you believe someone or if you believe what they say or write, you accept that they are telling the truth.
例句
He did not sound as if he believed her...
他听起来似乎并不相信她。
Never believe anything a married man says about his wife...
永远不要相信一个已婚男人说的任何有关他妻子的话。
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VERB
相信有…；认为…存在
If you believe in fairies, ghosts, or miracles, you are sure that they exist or happen. If you believe in a god, you are sure of the existence of that god.
例句
I don't believe in ghosts...
我不相信有鬼。
Do you believe in magic?
你相信魔法真的存在吗？
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VERB
认为…是应该的（或正确的）
If you believe in a way of life or an idea, you are in favour of it because you think it is good or right.
例句
He believed in marital fidelity.
他认为婚内应该忠诚。
...decent candidates who believed in democracy.
信奉民主政治的正派候选人
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VERB
对…有信心；信任；信赖
If you believe in someone or what they are doing, you have confidence in them and think that they will be successful.
例句
If you believe in yourself you can succeed.
只要自信，就能成功。
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VERB
（表示惊奇）难以置信
Believe is used in expressions such as I can't believe how or it's hard to believe that in order to express surprise, for example because something bad has happened or something very difficult has been achieved.
例句
Many officers I spoke to found it hard to believe what was happening around them...
很多和我谈过的官员都觉得发生在他们周围的事情令人难以置信。
I was a physical and emotional wreck — I still can't believe how I ever got any work done.
我那时身心俱疲——现在还难以相信我是怎么把一些事情做成的。
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PHRASE
（表示对所见所闻惊讶不已）相信自己的眼睛/耳朵
If you say that you cannot believe your eyes or cannot believe your ears, you are emphasizing that you are very surprised about something you have seen or heard.
例句
I could not believe my eyes. She was far more beautiful than I had imagined.
我简直不敢相信自己的眼睛。她比我想象的漂亮多了。
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PHRASE
（强调刚才所述之事令人吃惊）信不信由你
You can use believe it or not to emphasize that what you have just said is surprising.
例句
That's normal, believe it or not.
那很正常，信不信由你。
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PHRASE
（强调对某事感到惊讶）你会相信吗？
If you say would you believe it, you are emphasizing your surprise about something.
例句
And would you believe it, he's younger than me!
你信吗？他比我年轻！
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PHRASE
（强调所述属实）相信我
You can use believe you me to emphasize that what you are saying is true.
例句
It's absolutely amazing, believe you me.
这太不可思议了，真的。