形容詞
會根據事實、邏輯嚟思考，唔會只係講情感 rational; of reasoning and judgement
佢係一個有理性嘅人，唔會做傻事嘅。
佢系一个有理性嘅人，唔会做傻事嘅。
He is a person with reasoning and judgement/He is a rational/reasonable person, (he) won't do any silly thing.
Definitions (Wiktionary)
noun
reason; rationality
adj
rational (syn.) 理智
Definitions (Kaifangcidian)
（沒有對應漢語詞彙）
Definitions (HSK3.0)
HSK3 七一九级词汇表 #2575
Examples (Tatoeba—Mandarin-English)
Mandarin
人人生而自由,在尊严和权利上一律平等。他们赋有理性和良心,并应以兄弟关系的精神相对待。
人人生而自由,在尊嚴和權利上一律平等。他們賦有理性和良心,並應以兄弟關係的精神相對待。
rén rén shēng ér zì yóu , zài zūn yán hé quán lì shàng yī lǜ píng děng 。 tā men fù yǒu lǐ xìng hé liáng xīn , bìng yīng yǐ xiōng dì guān xi de jīng shén xiāng duì dài 。
All human beings are born free and equal in dignity and rights. They are endowed with reason and conscience and should act towards one another in a spirit of brotherhood.
All human beings are born free and equal in dignity and rights. They are endowed with reason and conscience and must behave one another in the spirit of brotherhood.
Mandarin
人人生而自由，尊严和权利平等。他们赋有理性和良知，应以弟兄之情互相对待。
人人生而自由，尊嚴和權利平等。他們賦有理性和良知，應以弟兄之情互相對待。
rén rén shēng ér zì yóu ， zūn yán hé quán lì píng děng 。 tā men fù yǒu lǐ xìng hé liáng zhī ， yīng yǐ dì xiong zhī qíng hù xiāng duì dài 。
All human beings are born free and equal in dignity and rights. They are endowed with reason and conscience and should act towards one another in a spirit of brotherhood.
Mandarin
保持理性的思维。
保持理性的思維。
bǎo chí lǐ xìng de sī wéi 。
Maintain rational thought.
Mandarin
灵魂是由理性、意志和情欲构成的。
靈魂是由理性、意志和情慾構成的。
líng hún shì yóu lǐ xìng 、 yì zhì hé qíng yù gòu chéng de 。
The soul is made up of reason, determination, and passion.
Mandarin
要我说，你们讲的有些逻辑语不理性。
要我說，你們講的有些邏輯語不理性。
yào wǒ shuō ， nǐ men jiǎng de yǒu xiē luó ji yǔ bù lǐ xìng 。
Not everything that you say in Lojban should be rational.
All human beings are born free and equal in dignity and rights. They are endowed with reason and conscience and should act towards one another in a spirit of brotherhood.
All human beings are born free and equal in dignity and rights. They are endowed with reason and conscience and must behave one another in the spirit of brotherhood.
All human beings are born free and equal in dignity and rights. They are endowed with reason and conscience and should act towards one another in a spirit of brotherhood.
He is a person with reasoning and judgement/He is a rational/reasonable person, (he) won't do any silly thing.
Examples (Wiktionary)
Mandarin
理性的东西所以靠得住，正是由于它来源于感性，否则理性的东西就成了无源之水，无本之木，而只是主观自生的靠不住的东西了。
理性的東西所以靠得住，正是由於它來源於感性，否則理性的東西就成了無源之水，無本之木，而只是主觀自生的靠不住的東西了。
lǐ xìng de dōng xi suǒ yǐ kào de zhù ， zhèng shì yóu yú tā lái yuán yú gǎn xìng ， fǒu zé lǐ xìng de dōng xi jiù chéng le wú yuán zhī shuǐ ， wú běn zhī mù ， ér zhǐ shì zhǔ guān zì shēng de kào bu zhù de dōng xi le ．
The rational is reliable precisely because it has its source in sense perceptions, other wise it would be like water without a source, a tree without roots, subjective, self-engendered and unreliable.
Mandarin
马克思主义者认为，只有人们的社会实践，才是人们对于外界认识的真理性的标准。
馬克思主義者認為，只有人們的社會實踐，才是人們對於外界認識的真理性的標準。
mǎ kè sī zhǔ yì zhě rèn wéi ， zhǐ yǒu rén men de shè huì shí jiàn ， cái shì rén men duì yú wài jiè rèn shi de zhēn lǐ xìng de biāo zhǔn ．
Marxists hold that people's social practice alone is the criterion of the truth of their knowledge of the external world.
Mandarin
理性认识依赖于感性认识，感性认识有待于发展到理性认识，这就是辩证唯物论的认识论。
理性認識依賴於感性認識，感性認識有待於發展到理性認識，這就是辯證唯物論的認識論。
lǐ xìng rèn shi yī lài yú gǎn xìng rèn shi ， gǎn xìng rèn shi yǒu dài yú fā zhǎn dào lǐ xìng rèn shi ， zhè jiù shì biàn zhèng wéi wù lùn de rèn shi lùn ．
Rational knowledge depends upon perceptual knowledge and perceptual knowledge remains to be developed into rational knowledge—this is the dialectical-materialist theory of knowledge.
Mandarin
哲学史上有所谓“唯理论”一派，就是只承认理性的实在性，不承认经验的实在性，以为只有理性靠得住，而感觉的经验是靠不住的，这一派的错误在于颠倒了事实。
哲學史上有所謂“唯理論”一派，就是隻承認理性的實在性，不承認經驗的實在性，以為只有理性靠得住，而感覺的經驗是靠不住的，這一派的錯誤在於顛倒了事實。
zhé xué shǐ shàng yǒu suǒ wèi “ wéi lǐ lùn ” yī pài ， jiù shì zhǐ chéng rèn lǐ xìng de shí zài xìng ， bù chéng rèn jīng yàn de shí zài xìng ， yǐ wéi zhǐ yǒu lǐ xìng kào de zhù ， ér gǎn jué de jīng yàn shì kào bu zhù de ， zhè yī pài de cuò wù zài yú diān dǎo le shì shí ．
In the history of philosophy there is the “rationalist” school that admits the reality only of reason and not of experience, believing that reason alone is reliable while perceptual experience is not; this school errs by turning things upside down.
Mandarin
要完全地反映整个的事物，反映事物的本质，反映事物的内部规律性，就必须经过思考作用，将丰富的感觉材料加以去粗取精、去伪存真、由此及彼、由表及里的改造制作工夫，造成概念和理论的系统，就必须从感性认识跃进到理性认识。
要完全地反映整個的事物，反映事物的本質，反映事物的內部規律性，就必須經過思考作用，將豐富的感覺材料加以去粗取精、去偽存真、由此及彼、由表及裏的改造製作工夫，造成概念和理論的系統，就必須從感性認識躍進到理性認識。
yào wán quán de fǎn yìng zhěng gè de shì wù ， fǎn yìng shì wù de běn zhì ， fǎn yìng shì wù de nèi bù guī lǜ xìng ， jiù bì xū jīng guò sī kǎo zuò yòng ， jiāng fēng fù de gǎn jué cái liào jiā yǐ qù cū qǔ jīng ， qù wěi cún zhēn ， yóu cǐ jí bǐ ， yóu biǎo jí lǐ de gǎi zào zhì zuò gōng fu ， zào chéng gài niàn hé lǐ lùn de xì tǒng ， jiù bì xū cóng gǎn xìng rèn shi yuè jìn dào lǐ xìng rèn shi ．
Fully to reflect a thing in its totality, to reflect its essence, to reflect its inherent laws, it is necessary through the exercise of thought to reconstruct the rich data of sense perception, discarding the dross and selecting the essential, eliminating the false and retaining the true, proceeding from the one to the other and from the outside to the inside, in order to form a system of concepts and theories—it is necessary to make a leap from perceptual to rational knowledge.