二氧化碳

• Pinyin: èr yǎng huà tàn
• Desglose de hanzi: 二 = 两横 (numeral two); 氧 = 气 (air/gas radical) + 羊 (phonetic component) — an oxygen-containing gas; 化 = 亻(person) + 匕 (inverted person) — transformation, a chemical compound; 碳 = 石 (stone/mineral radical) + 炭 (charcoal/phonetic) — a mineral carbon compound

Significado

Dióxido de carbono (CO₂).

二氧化碳 is the standard scientific and everyday term for CO2 in Chinese. Central to climate discourse: 减少二氧化碳排放 (reduce CO2 emissions), 碳中和 (carbon neutrality), 温室效应 (greenhouse effect). Also appears in chemistry education, food science (carbonation), and industrial contexts (dry ice is solid CO2).

Ejemplos

1. 科学研究表明，大气中二氧化碳浓度的持续攀升是推动全球气温上升的主要因素之一。
2. 植物通过光合作用将二氧化碳和水转化为有机物与氧气，这是地球生态系统的重要基础。
3. 为实现碳中和目标，企业需要系统性地减少生产过程中的二氧化碳排放，并探索多元化的碳汇途径。

Guía de uso

Contexto: science, environment, education, industry

Tono: neutral

Correcto

• 根据政府间气候变化专门委员会的最新评估报告，若全球二氧化碳排放量不能在本世纪中叶前大幅削减，气候变化的不可逆影响将进一步加剧。(According to the latest assessment report of the Intergovernmental Panel on Climate Change, if global carbon dioxide emissions cannot be substantially reduced before the middle of this century, the irreversible impacts of climate change will intensify further.)
• 该实验通过严格控制密封容器内的二氧化碳浓度，系统性地观测了不同碳浓度环境对植物叶片光合效率的影响差异。(This experiment systematically observed differences in the impact on the photosynthetic efficiency of plant leaves by strictly controlling the carbon dioxide concentration inside a sealed container at varying levels.)

Incorrecto

• 二氧化碳很危险 — making this blanket statement is misleading; be specific about context, e.g. 高浓度二氧化碳环境会导致窒息，对人体有害

Origen e historia

二 (two) + 氧 (oxygen) + 化 (compound/transform) + 碳 (carbon) — a chemical compound of one carbon atom bonded to two oxygen atoms

Contexto cultural

Época: Modern

Generación: All ages

Contexto social: Universal