reason

noun

1. 原因；理由；解释
   a cause or an explanation for sth that has happened or that sb has done
   1. I'd like to know the reason why you're so late.
      我想知道你为什么迟到那么长时间。
   2. We aren't going for the simple reason that we can't afford it.
      我们不去，只是因为我们负担不起。
   3. She gave no reasons for her decision.
      她没有对她的决定作出任何解释。
   4. I have no particular reason for doubting him.
      我没有什么特别的理由怀疑他。
   5. He said no but he didn't give a reason .
      他说不行，但没有说明原因。
   6. Give me one good reason why I should help you.
      我为什么要帮你？给我一个充分的理由。
   7. For some reason (= one that I don't know or don't understand) we all have to come in early tomorrow.
      出于某种原因，我们大家明天都不得不早点来。
   8. The man attacked me for no apparent reason .
      那个人不知何故攻击我。
   9. She resigned for personal reasons .
      她出于个人原因而辞职。
   10. For reasons of security the door is always kept locked.
       为了保证安全，门总是锁着的。
   11. He wants to keep them all in his office for reasons best known to himself .
       他想把他们都留在他的办公室里，原因只有他自己知道。
   12. people who, for whatever reason , are unable to support themselves
       那些因为种种原因不能自立的人
   13. ‘Why do you want to know?’ ‘ No reason. ’ (= I do not want to say why)
       “你为什么想知道？”“不为什么。”
   14. ‘Why did she do that?’ ‘She must have her reasons (= secret reasons which she does not want to tell) .’
       “她为什么那么做？”“她一定有她的理由。”
   15. He was excused by reason of (= because of) his age.
       他因为其年龄而得到原谅。
2. 正当理由；道理；情理
   a fact that makes it right or fair to do sth
   1. They have reason to believe that he is lying.
      他们有理由认为他是在撒谎。
   2. We have every reason (= have very good reasons) to feel optimistic.
      我们完全有理由感到乐观。
   3. This result gives us all the more reason for optimism.
      这个结果使我们更有理由保持乐观。
   4. She complained, with reason (= rightly) , that she had been underpaid.
      她抱怨给她的报酬太低，是有道理的。
3. 思考力；理解力；理性
   the power of the mind to think in a logical way, to understand and have opinions, etc.
   1. Only human beings are capable of reason (= of thinking in a logical way, etc.) .
      只有人类才有理性思考的能力。
   2. to lose your reason (= become mentally ill)
      神经失常
4. 道理；情理；明智
   what is possible, practical or right
   1. I can't get her to listen to reason .
      我没法跟她讲道理。
   2. Why can't they see reason ?
      他们为什么不明事理？
   3. to be open to reason (= to be willing to accept sensible advice)
      愿意听好言相劝
   4. He's looking for a job and he's willing to do anything within reason .
      他在找工作，而且只要是正当的事他都愿意做。

verb

1. 推理；推论；推断
   to form a judgement about a situation by considering the facts and using your power to think in a logical way
   1. She reasoned that she must have left her bag on the train.
      她断定准是把包落在火车上了。
   2. They couldn't fire him, he reasoned. He was the only one who knew how the system worked.
      他分析他们不会解雇他。他是唯一知道这套系统如何运转的人。
2. 思考；理解
   to use your power to think and understand
   1. the human ability to reason
      人的思考能力

1. N-COUNT 原因；理由；动机
   The reason for something is a fact or situation which explains why it happens or what causes it to happen.
   1. There is a reason for every important thing that happens...
      每件重要事情的发生都有原因。
   2. Who would have a reason to want to kill her?
      谁会有杀她的动机呢？
   3. ...the reason why Italian tomatoes have so much flavour...
      意大利番茄如此美味的原因
   4. The only reason I went was because I was told to...
      我去的唯一原因是我被告知要去。
   5. My parents came to Germany for business reasons...
      我父母因公来到德国。
   6. The exact locations are being kept secret for reasons of security.
      确切地点因为安全原因要保密。
2. N-UNCOUNT 理由；确凿的证据
   If you say that you have reason to believe something or to have a particular emotion, you mean that you have evidence for your belief or there is a definite cause of your feeling.
   1. They had reason to believe there could be trouble...
      他们有理由相信可能会遇到麻烦。
   2. He had every reason to be upset...
      他完全有理由生气。
   3. He doesn't trust me. With good reason.
      他不信任我是有充分理由的。
3. N-UNCOUNT 理性;理智
   The ability that people have to think and to make sensible judgments can be referred to as reason .
   1. ...a conflict between emotion and reason...
      情感和理智的冲突
   2. Mike is my voice of reason. He thinks logically and points out where I'm going wrong.
      迈克帮我保持理智。他的思维很有逻辑性，可以指出我的错误。
4. See also: I reasoned that changing my diet would lower my cholesterol level... 'Listen,' I reasoned, 'it doesn't take a genius to figure out what Adam's up to.' reasoned reasoning
5. PHRASE （常用来暗指不赞成某人的所作所为）只有自己知道为什么，出于自身的理由
   If you do not know why someone did something, you can say that they did it for reasons best known to themselves. You usually use this expression when you do not agree with what they did.
   1. For reasons best known to himself, Algie changed his name.
      不知是出于什么原因，阿尔吉改了名字。
6. PHRASE 因为；由于；由…引起；以…为理由
   If one thing happens by reason of another, it happens because of it.
   1. The boss retains enormous influence by reason of his position...
      老板由于自身的地位而一直有极大的影响力。
   2. He pleaded innocent by reason of insanity.
      他以精神不健全为由申辩无罪。
7. PHRASE 听从劝告;理智行事
   If you try to make someone listen to reason, you try to persuade them to listen to sensible arguments and be influenced by them.
   1. The company's top executives had refused to listen to reason.
      公司的高层管理人员拒绝理智行事。
8. PHRASE 无缘无故；莫名其妙；没有理由
   If you say that something happened or was done for no reason ,for no good reason, or for no reason at all, you mean that there was no obvious reason why it happened or was done.
   1. The guards, he said, would punch them for no reason...
      他说警卫会无缘无故殴打他们。
   2. For no reason at all the two men started to laugh.
      两个人莫名其妙地开始大笑。
9. PHRASE 活着的理由；生存的原因
   If a person or thing is someone's reason for living or their reason for being, they are the most important thing in that person's life.
   1. Chloe is my reason for living.
      克洛艾是我活着的理由。
10. PHRASE 不知为何;不知什么原因
    If you say that something happened or is true for some reason, you mean that you know it happened or is true, but you do not know why.
    1. For some reason, the curtains were shut...
       不知什么原因，窗帘拉着。
    2. For some inexplicable reason she was attracted to Patrick.
       因为某些无法解释的原因，她被帕特里克所吸引。
11. PHRASE 正当的;合乎情理的;理智范围内的
    If you say that you will do anything within reason, you mean that you will do anything that is fair or reasonable and not too extreme.
    1. I will take any job that comes along, within reason...
       我会接受任何给我的工作，只要是正当的。
    2. It means working, within reason, for whatever time is necessary.
       这意味着在合理的范围内花费所有必要的时间工作。
12. rhyme or reason → see: rhyme

1. I don't have any particular reason to distrust them.
   我没有任何特别的理由怀疑他们。
2. I still have no reason to doubt his word.
   我还是没有理由怀疑他的话。
3. He lost all sense of reason
   他完全丧失了理智。
4. There's no reason why you can't have a perfectly normal child
   你没有理由不能拥有一个完全正常的孩子。
5. The principal reason for my change of mind is this.
   这是我改变主意的最主要原因。
6. There is a reason for every important thing that happens
   每件重要事情的发生都有原因。
7. Who would have a reason to want to kill her?
   谁会有杀她的动机呢？
8. The only reason I went was because I was told to
   我去的唯一原因是我被告知要去。
9. My parents came to Germany for business reasons
   我父母因公来到德国。
10. The exact locations are being kept secret for reasons of security.
    确切地点因为安全原因要保密。
11. They had reason to believe there could be trouble
    他们有理由相信可能会遇到麻烦。
12. He had every reason to be upset
    他完全有理由生气。
13. I reasoned that changing my diet would lower my cholesterol level
    我推断改变自己的饮食可以降低我的胆固醇水平。
14. 'Listen,' I reasoned, 'it doesn't take a genius to figure out what Adam's up to.'
    “听着，”我分析道，“要弄清楚亚当想要干什么很容易。”
15. For reasons best known to himself, Algie changed his name.
    不知是出于什么原因，阿尔吉改了名字。
16. He pleaded innocent by reason of insanity.
    他以精神不健全为由申辩无罪。
17. The company's top executives had refused to listen to reason.
    公司的高层管理人员拒绝理智行事。
18. The guards, he said, would punch them for no reason
    他说警卫会无缘无故殴打他们。
19. For no reason at all the two men started to laugh.
    两个人莫名其妙地开始大笑。
20. Chloe is my reason for living.
    克洛艾是我活着的理由。
21. For some reason, the curtains were shut
    不知什么原因，窗帘拉着。
22. For some inexplicable reason she was attracted to Patrick.
    因为某些无法解释的原因，她被帕特里克所吸引。
23. I will take any job that comes along, within reason
    我会接受任何给我的工作，只要是正当的。
24. It means working, within reason, for whatever time is necessary.
    这意味着在合理的范围内花费所有必要的时间工作。
25. I think I've sussed the reason for it
    我想我已经弄清楚其中的缘由了。
26. There's a reason why women don't read this stuff; it's not funny
    女人不读这种东西是有原因的，它并不好笑。
27. There's no reason whatsoever to turn down this suggestion.
    没有任何理由拒绝这个建议。
28. We have every reason to believe that the news is true.
    我们有充分的理由相信这消息是可靠的。
29. I have no reason to quarrel with him.
    我没有跟他口角的理由。
30. I was criticized without any reason.
    我平白无故挨了批评。

  reason cause excuse ground【导航词义：原因，理由】

  reason n. 原因，理由

〔辨析〕指某事发生的原因或做某事的正当理由，常后接介词 for 及 why 或 that 引导的从句，作“理由”解时还可后接动词不定式。

  cause n. 起因，理由

〔辨析〕指导致某事发生的行为、事件等；也指产生某种感情或做出某种举动的正当理由，作此义解时常可与 reason 换用。

  excuse n. 理由，托词

〔辨析〕指辩解的理由或推脱的借口，常后接介词 for。

  ground n. 充分理由 ，根据

〔辨析〕指做某事的正当理由，作此义解时通常用复数。

reason sth out

1. 通过思考想出对策
   to try and find the answer to a problem by using your power to think in a logical way
   1. I'd like to know the reason why you're so late.
      我想知道你为什么迟到那么长时间。
   2. We aren't going for the simple reason that we can't afford it.
      我们不去，只是因为我们负担不起。
   3. She gave no reasons for her decision.
      她没有对她的决定作出任何解释。
   4. I have no particular reason for doubting him.
      我没有什么特别的理由怀疑他。
   5. He said no but he didn't give a reason .
      他说不行，但没有说明原因。
   6. Give me one good reason why I should help you.
      我为什么要帮你？给我一个充分的理由。
   7. For some reason (= one that I don't know or don't understand) we all have to come in early tomorrow.
      出于某种原因，我们大家明天都不得不早点来。
   8. The man attacked me for no apparent reason .
      那个人不知何故攻击我。
   9. She resigned for personal reasons .
      她出于个人原因而辞职。
   10. For reasons of security the door is always kept locked.
       为了保证安全，门总是锁着的。
   11. He wants to keep them all in his office for reasons best known to himself .
       他想把他们都留在他的办公室里，原因只有他自己知道。
   12. people who, for whatever reason , are unable to support themselves
       那些因为种种原因不能自立的人
   13. ‘Why do you want to know?’ ‘ No reason. ’ (= I do not want to say why)
       “你为什么想知道？”“不为什么。”
   14. ‘Why did she do that?’ ‘She must have her reasons (= secret reasons which she does not want to tell) .’
       “她为什么那么做？”“她一定有她的理由。”
   15. He was excused by reason of (= because of) his age.
       他因为其年龄而得到原谅。

reason with sb

1. 和某人讲道理；规劝
   to talk to sb in order to persuade them to be more sensible
   1. Only human beings are capable of reason (= of thinking in a logical way, etc.) .
      只有人类才有理性思考的能力。
   2. to lose your reason (= become mentally ill)
      神经失常

n.

it stands to reason

• 这是人人都清楚的；这是明摆着的
  it must be clear to any sensible person who thinks about it
  1. It stands to reason that they'll leave if you don't pay them enough.
     这是明摆着的，你不给他们足够的报酬，他们就走人。

there's no rhyme or reason to/for sth

without rhyme or reason

• 毫无道理；无规律可循；莫名其妙
  if there is no rhyme or reason to sth or it happens without rhyme or reason , it happens in a way that cannot be easily explained or understood

noun

1. the capacity for rational thought or inference or discrimination
   1. we are told that man is endowed with reason and capable of distinguishing good from evil

   Synonym:    understandingintellect

2. a fact that logically justifies some premise or conclusion
   1. there is reason to believe he is lying

3. an explanation of the cause of some phenomenon
   1. the reason a steady state was never reached was that the back pressure built up too slowly

4. a justification for something existing or happening
   1. he had no cause to complain
   2. they had good reason to rejoice

   Synonym:    causegrounds

5. a rational motive for a belief or action
   1. the reason that war was declared
   2. the grounds for their declaration

   Synonym:    ground

6. the state of having good sense and sound judgment
   1. his rationality may have been impaired
   2. he had to rely less on reason than on rousing their emotions

   Synonym:    rationalityreasonableness

verb

1. think logically
   1. The children must learn to reason

2. decide by reasoning
   1. We reasoned that it was cheaper to rent than to buy a house

   Synonym:    reason outconclude

3. present reasons and arguments

   Synonym:    argue