reason
noun uk/ˈriː.zən/ us/ˈriː.zən/
(EXPLANATION)
A2 [ C or U ]原因；理由；解释
the cause of an event or situation or something that provides an excuse or explanation
The reason for the disaster was engine failure, not human error. 这次灾难的原因是发动机故障，而非人为错误。
[ + question word ] The reason why grass is green was a mystery to the little boy. 对这个小男孩来说，草为什么是绿色的是一个谜。
[ + (that) ] The reason (that) I'm calling is to ask a favour. 我打电话是为了恳请帮忙。
not standard The reason I walked out was because I was bored. 我走出去是因为我感到很无聊。
[ + to infinitive ] The police have (every good) reason to believe that he is guilty. 警方（完全）有理由认定他有罪。
She was furious, and with reason (= with good cause). 她很生气，这也有情可原。
For some reason/For reasons best known to himself (= for reasons no one else knows about) he's decided to leave his job. 出于某种原因／由于某些不为人知的原因，他决定辞职。
by reason of formal 由于，因为
because of
He's always asked to these occasions by reason of his position. 因为地位很高，他经常被邀请出席这些场合。
He was found not guilty by reason of insanity.
She was found guilty of manslaughter by reason of provocation.
By reason of God's love, we are made his children.
She pleaded guilty to manslaughter by reason of diminished responsibility.
- More examples
- I see no reason for us to depart from our usual practice.
- Car exhaust is the main reason for the city's pollution.
- I go to church for weddings but not for any other reason.
- For some reason the story caught the imagination of the public.
- We made this decision purely for financial reasons.
(JUDGMENT)
[ U ]（尤指基于实际情况的）判断力，理性，理智
the ability of a healthy mind to think and make judgments, especially based on practical facts
We humans believe that we are the only animals to have the power of reason. 我们人类认为自己是唯一具有理性思考能力的动物。
mainly UK old-fashioned He lost his reason (= became mentally ill) when both his parents were killed in the crash. 他的父母都死于车祸，这使他精神失常。
within reasonC2 合情合理；有分寸；有道理
within the limits of what is acceptable and possible
We can wear anything we like to the office, within reason. 只要不出格，我们在办公室可以爱穿什么就穿什么。
Spend whatever you need to spend, within reason.
We're willing to do anything within reason to ensure its success.
He'd do anything I asked - you know, anything within reason.
People should be allowed to do what they want, within reason.
You can have anything you like, within reason.
- More examples
- He argued that morality could be conceptualized as a series of principles based on human reason.
- And did reason prevail over emotion?
- If 20% of the earth's population has 80% of its resources, then it stands to reason that 80% of the population has only 20% of the resources.
- His powers of reason set him apart from the candidates.
- Choose whatever you like from the menu, within reason!
Idiom
listen to reasonidiom (also see reason) 听从劝告;明白事理;懂道理
to listen to good advice and be influenced by it
Friends tried to persuade them to change their minds, but neither man would listen to reason. 朋友们都力劝他们改变想法，但是这两个人谁都不听劝告。
reason
verb [ T ] uk/ˈriː.zən/ us/ˈriː.zən/
推理，推断;判断
to try to understand and to make judgments based on practical facts
[ + (that) ] Newton reasoned (that) there must be a force such as gravity 牛顿推断出这一定是由于某种力的缘故，比如重力。
I spent hours reasoning out the solution to the puzzle. 我花了好几个小时才解开这个谜。
Phrasal verb
reason with someone 与（某人）讲道理;说服（某人）;规劝（某人）
to try to persuade someone to act in a wise way or to change their behaviour or a decision, by explaining why it is a good idea
[ + to infinitive ] The police reasoned with the hijackers to at least let the children go free. 警察劝说劫持犯，让他们至少把孩子们放了。