| 分类理论 | fēn lèi lǐ lùn | classification theory |
| 动植物分类 | dòng zhí wù fēn lèi | taxonomy |
| 动物分类 | dòng wù fēn lèi | taxonomy; classification of animals |
| 厌恶人类者 | yàn wù rén lèi zhě | misanthrope |
| 反人类 | fǎn rén lèi | inhuman |
| 反人类罪 | fǎn rén lèi zuì | crimes against humanity |
| 古人类 | gǔ rén lèi | ancient hominid species such as Homo erectus, Neanderthal man etc |
| 另类 | lìng lèi | offbeat; alternative; avant-garde; unconventional; weird |
| 另类医疗 | lìng lèi yī liáo | alternative medicine |
| 合成类固醇 | hé chéng lèi gù chún | anabolic steroids |
| 同类产品 | tóng lèi chǎn pǐn | similar product |
| 同类相吸 | tóng lèi xiāng xī | Like attracts like. |
| 同类相食 | tóng lèi xiāng shí | cannibalism |
| 同余类 | tóng yú lèi | congruence class (of integers modulo n) |
| 呼朋引类 | hū péng yǐn lèi | to call up all one's associates; rent-a-crowd |
| 哺乳类 | bǔ rǔ lèi | mammals; also written 哺乳动物 |
| 哺乳类动物 | bǔ rǔ lèi dòng wù | mammals |
| 单端孢霉烯类毒素 | dān duān bāo méi xī lèi dú sù | trichothecenes (TS, T-2) |
单端孢霉烯类毒素
中毒症 | dān duān bāo méi xī lèi dú sù zhōng dú zhèng | trichothecenes toxicosis |
| 噍类 | jiào lèi | a living being (esp. human) |
| 啮齿类 | niè chǐ lèi | rodents (rat, rabbit etc) |
| 多足类 | duō zú lèi | centipedes and millipedes |
| 大类 | dà lèi | main type; main class; main category |
| 奇蹄类 | jī tí lèi | Perissodactyla (odd-toed ungulates, such as horses, zebras etc) |
| 德贵丽类 | Dé guì lì lèi | daiquirí |
| 恐龙类 | kǒng lóng lèi | dinosaurs |
| 击弦类 | jī xián lèi | hammered string type (of musical instrument) |
| 击弦类乐器 | jī xián lèi yuè qì | hammered string musical instrument |
| 新新人类 | xīn xīn rén lèi | new generation of youths (generation X, Y etc) |
| 有教无类 | yǒu jiào wú lèi | education for everyone, irrespective of background |
| 有教无类法 | Yǒu jiào wú lèi fǎ | No Child Left Behind Act, USA 2001 |
| 有机磷酸酯类 | yǒu jī lín suān zhǐ lèi | organophosphate |
| 此类 | cǐ lèi | this kind; these kinds; such |
氨基甲酸酯类化合
物 | ān jī jiǎ suān zhǐ lèi huà hé wù | carbamate |
| 汤类 | tāng lèi | soup dishes (on menu) |
| 爬虫类 | pá chóng lèi | reptiles; also written 爬行类 |
| 爬行类 | pá xíng lèi | reptiles; also written 爬行动物 |
| 物以类聚 | wù yǐ lèi jù | similar things come together (idiom); like draws like; Birds of a feather flock together. |
物以类聚，
人以群分 | wù yǐ lèi jù ,
rén yǐ qún fēn | Similar things group together, similar people fit together (idiom); Birds of a feather flock together. |
| 兽脚类恐龙 | shòu jiǎo lèi kǒng lóng | theropod (beast-footed dinosaur group); suborder Theropoda within order Saurischia containing carnivorous dinosaurs |
| 球类 | qiú lèi | ball sports |
| 甲壳虫类 | jiǎ ké chóng lèi | coleoptera |
| 甲壳类 | jiǎ qiào lèi | crustacean |
| 畜类 | chù lèi | domestic animal |
| 画虎类犬 | huà hǔ lèi quǎn | drawing a tiger like a dog (idiom); to make a fool of oneself by excessive ambition |
| 相类 | xiāng lèi | similar |
| 示性类 | shì xìng lèi | characteristic class (math.) |
| 祖鸟类 | zǔ niǎo lèi | dinosaur ancestors of birds |
| 禽类 | qín lèi | bird species; birds |
| 谷类 | gǔ lèi | cereal; grain |
