phrase, idiomatic
to discard the dross and select the essential
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。
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。
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.
Definitions (Kaifangcidian)
（沒有對應漢語詞彙）
Examples (粵典–words.hk)
Cantonese
去粗取精
去粗取精
heoi3 cou1 ceoi2 zing1
to discard the dross and select the essence
Examples (Wiktionary)
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.