Word

二氧化碳 (èr yǎng huà tàn) — Chinese word meaning

HSK 6

Meaning of 二氧化碳

名 míng noun

carbon dioxide

植物通过光合作用吸收二氧化碳。

zhí wù tōng guò guāng hé zuò yòng xī shōu èr yǎng huà tàn

Plants absorb carbon dioxide through photosynthesis.

Word breakdown

二 èr — two, di- (prefix indicating two atoms)

1 二手 èr shǒu — secondhand HSK 5
- 二 second (ordinal)
- 手 hand (indicating previous ownership)
Example

我买了一辆二手车。

wǒ mǎi le yī liàng èr shǒu chē

I bought a secondhand car.
2 二维码 èr wéi mǎ — QR code HSK 5
- 二 two (indicating two-dimensional)
- 维 dimension
- 码 code
Example

请扫描这个二维码付款。

qǐng sǎo miáo zhè ge èr wéi mǎ fù kuǎn

Please scan this QR code to make payment.
3 一干二净 yì gān èr jìng — completely clean, spotless HSK 7
- 一 one, completely
- 干 dry, thorough
- 二 two, doubly
- 净 clean, pure
Example

他把房间打扫得一干二净。

tā bǎ fáng jiān dǎ sǎo de yì gān èr jìng

He cleaned the room until it was spotlessly clean.
4 接二连三 jiē èr lián sān — one after another HSK 7
- 接 connect, join
- 二 two (beginning of sequence)
- 连 link, connect continuously
- 三 three (continuation of sequence)
Example

最近公司接二连三地出现问题。

zuì jìn gōng sī jiē èr lián sān de chū xiàn wèn tí

Recently, the company has had problems one after another.
5 数一数二 shǔ yī shǔ èr — one of the best; among the top HSK 7
- 数 to count; indicates the act of ranking or enumerating
- 一 one; represents first place or top position
- 数 to count (repeated); continues the enumeration process
- 二 two; represents second place, completing the top tier
Example

这家餐厅在城里数一数二。

zhè jiā cān tīng zài chéng lǐ shǔ yī shǔ èr

This restaurant is one of the best in the city.

Show more (+1)

6 独一无二 dú yī wú èr — unique HSK 7
- 独 alone, sole
- 一 one
- 无 without, no
- 二 two, second
Example

每个人都是独一无二的。

měi gè rén dōu shì dú yī wú èr de

Every person is unique.

氧 yǎng — oxygen (element)

化 huà — -ide (suffix for chemical compounds)

碳 tàn — carbon (element)

Structure & writing

1 二 èr — two (the number 1+1)

二 is a component in 5 characters

HSK 1

些 xiē placed after a verb or adjective to mean slightly or a little

HSK 3

言 yán (lit.) to speak; to say

HSK 4

云 yún (lit.) to say

HSK 7

仁 rén benevolence; the Confucian moral concept centered on compassion, love, and altruism 腻 nì to feel put off by greasy food

二 is an atomic character — it does not decompose further.

Stroke order

2 氧 yǎng — oxygen (chemical element, symbol O, atomic number 8)

氧 is not used as a component in any other character.

consists of

2.1 气 qì — gas; a substance with no fixed shape or volume that spreads freely

气 is a component in 3 characters

HSK 3

汽 qì gas or vapor formed by heating a liquid or certain solids

HSK 6

氛 fēn atmosphere; aura 氧 yǎng oxygen (chemical element, symbol O, atomic number 8)

2.2 羊 yáng — sheep or goat (mammal with horns, including domestic breeds like sheep and goats, and wild species like gazelles and antelopes; wool, hide, bone, and horn used as industrial materials; meat and milk edible)

羊 is a component in 20 characters

HSK 1

样 yàng shape; appearance; state of affairs

HSK 2

着 zhuó to wear (clothing)

HSK 3