"the reason that war was declared"
"the grounds for their declaration"
"the reason a steady state was never reached was that the back pressure built up too slowly"
"we are told that man is endowed with reason and capable of distinguishing good from evil"
"his rationality may have been impaired"
"he had to rely less on reason than on rousing their emotions"
"he had no cause to complain"
"they had good reason to rejoice"
"there is reason to believe he is lying"
"We reasoned that it was cheaper to rent than to buy a house"
"The children must learn to reason"
1.原因；理由；动机
Thereason for something is a fact or situation which explains why it happens or what causes it to happen.
e.g. There is areason for every important thing that happens...
每件重要事情的发生都有原因。
e.g. Who would have areason to want to kill her?
谁会有杀她的动机呢？
2.理由；确凿的证据
If you say that you havereason to believe something orto have a particular emotion, you mean that you have evidence for your belief or there is a definite cause of your feeling.
reason的反义词
e.g. They hadreason to believe there could be trouble...
他们有理由相信可能会遇到麻烦。
e.g. He had everyreason to be upset...
他完全有理由生气。
3.理性;理智
The ability that people have to think and to make sensible judgments can be referred to asreason .
e.g. ...a conflict between emotion andreason...
情感和理智的冲突
e.g. Mike is my voice ofreason. 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.推理;推论;推断
If youreason that something is true, you decide that it is true after thinking carefully about all the facts.
e.g. 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。
e.g. '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。”
5.（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 itfor reasons best known to themselves. You usually use this expression when you do not agree with what they did.
e.g. 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.因为；由于；由…引起；以…为理由
If one thing happensby reason of another, it happens because of it.
e.g. The boss retains enormous influence byreason of his position...
老板由于自身的地位而一直有极大的影响力。
e.g. He pleaded innocent byreason of insanity.
他以精神不健全为由申辩无罪。
7.听从劝告;理智行事
If you try to make someonelisten to reason, you try to persuade them to listen to sensible arguments and be influenced by them.
e.g. The company's top executives had refused to listen toreason.
公司的高层管理人员拒绝理智行事。
8.无缘无故；莫名其妙；没有理由
If you say that something happened or was donefor no reason ,for no good reason, orfor no reason at all, you mean that there was no obvious reason why it happened or was done.
reason是什么意思
e.g. The guards, he said, would punch them for noreason...
他说警卫会无缘无故殴打他们。
e.g. For noreason at all the two men started to laugh.
两个人莫名其妙地开始大笑。
9.活着的理由；生存的原因
If a person or thing is someone'sreason for living or theirreason for being, they are the most important thing in that person's life.
e.g. Chloe is myreason for living.
克洛艾是我活着的理由。
10.不知为何;不知什么原因
If you say that something happened or is truefor some reason, you mean that you know it happened or is true, but you do not know why.
e.g. For somereason, the curtains were shut...
不知什么原因，窗帘拉着。
e.g. For some inexplicablereason 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.正当的;合乎情理的;理智范围内的
If you say that you will do anythingwithin reason, you mean that you will do anything that is fair or reasonable and not too extreme.
e.g. I will take any job that comes along, withinreason...
我会接受任何给我的工作，只要是正当的。
e.g. It means working, withinreason, 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 orreason -> see rhyme
toreason -> see
it stands toreason -> see stand
相关词组：reason with
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2. 原因,理由：我有时候惊讶于他们这种不问原因的信仰,同时也惊讶我们自己为理性的驯服:没有理由已经成为我们没有信仰的基本原因,理由(reason)已经成为我们信任与信仰的前提.
