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rational

Word family 
ra·tion·al /ˈræʃənəl/ ●●○ AWL adjectiveadj  
1  LOGICALrational thoughts, decisions etc are based on reasons rather than emotions 〔想法、决定等〕合理的，基于理性的 OPP irrational
 Parents need to be fully informed so they can make a rational decision.
父母需要充分了解情况，这样才可以作出合理的决定。
 I’m sure there’s a rational explanation for all this.
我相信这一切都有合理的解释。
 It’s impossible to have a rational conversation with him.
不可能和他进行理性的谈话。
2  SENSIBLEa rational person is able to think calmly and sensibly 〔人〕有理性的，理智的 OPP irrational
 Culley was quite rational at the time of her baby’s death.
卡莉在她孩子死去时相当理智。
3  formal able to make sensible judgments 能作出理智决定的，理性的
 Man is a rational animal.
人类是理性动物。
—rationally adverbadv
 We were too shocked to think rationally.
我们太过震惊，难以理智地思考。
—rationality /ˌræʃəˈnæləlti/ noun [uncountableU]
n COLLOCATIONS
nouns
a rational explanation
I told myself that there must be some simple, rational explanation.
a rational decision/choice
The patient was incapable of making a rational decision.
a rational approach
We must adopt a rational approach when dealing with this problem.
a rational analysis
Emotions are running so high that any rational analysis of the situation is difficult.
rational thought
Babies were thought to be incapable of rational thought.
rational argument
Nuclear weapons are so absurd that rational argument about their use is scarcely possible.
a rational conversation/discussion
Let's all calm down and have a rational discussion.
adverbs
perfectly rational
I'm sure there's a perfectly rational explanation.
Examples from the Corpus
rational• The talk was lively and, compared to Morrison's drivel, refreshingly rational.• Many of the patients have long histories of drug abuse, and they're not always rational.• People's behaviour isn't always purely rational.• Such beliefs serve to explain the system to its members: they make social inequality appear rational and reasonable.• We're looking for someone with a rational approach to dealing with problems.• rational behavior• From a rational choice perspective, you would be rather foolish to vote in a presidential election.• It should be seen as seven functional stages of the budgetary process which take place in a political or rational context.• Education helps us to make rational decisions.• Should they, then, be branded as spurious designators and banished from rational discourse?• There is no rational explanation for Melanie Hawkin's disappearance.• There must be some rational explanation for this apparently bizarre phenomenon.• Let's try and discuss this like two rational human beings.• How can a rational man be taken in by these arguments?• Consequently rational members of organizations are more likely to stay loyal and inactive than to be vocal participants.• There appears to be no rational motive for the attack.• Exactly how a rational person will solve it we shall show later on.• No rational person would have agreed to those terms.• Taking action to defend yourself is a completely rational reaction if you're being attacked.
rational explanation• In any case, Amiss's mind was racing, grappling with a situation devoid of any rational explanation.• The subsequent references by the deceased to £17,000 as the value of his portfolio were not the subject of any rational explanation.• Through their various plights, the drama questions a world where feminine ideals regularly defy rational explanation.• There was a rational explanation for all this and, when Carol arrived, he'd discover what it was.• This is the mystery of sin which has no rational explanation, for it is ultimately and radically inexplicable.• Only now have scientists begun to offer rational explanations for this phenomenon.• Either way, there has to be some rational explanation of Clinton's conduct.• I told myself that there must be some simple, rational explanation, something Illingworth had overlooked.
Origin rational
(1300-1400) Latin rationalis, from ratio; → RATIO
ra·tion·al adjectiveadj →n COLLOCATIONS1
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