co2

co2的音标是[kəʊ ˈ sekɪəʊ]；基本翻译是二氧化碳；速记技巧是：看到co2，想到可乐（coke），二氧化碳溶于水，喷泉（spout）喷出来。

CO₂的英文词源：

CO₂是carbon dioxide的缩写，意为二氧化碳。二氧化碳这个词源于拉丁词源carbon，意为碳。它是一种无色、无味、不易燃烧的气体，在常温常压下为气体。

变化形式：

二氧化碳可以是固态的干冰，也可以是气态的。它的化学性质非常活泼，可以和许多物质发生反应。

相关单词：

1. carbon：碳 - 指碳元素，是构成二氧化碳的基本元素。

2. oxide：氧化物 - 二氧化碳是一种氧化物，是由氧元素和另一种元素组成的化合物。

3. combustion：燃烧 - 二氧化碳在燃烧过程中可以产生。

4. respiration：呼吸 - 人类和许多其他生物通过呼吸过程可以产生二氧化碳。

5. carbon dioxide sensor：二氧化碳传感器 - 用于检测环境中二氧化碳浓度的仪器。

6. carbon dioxide release：二氧化碳排放 - 指人类活动产生的二氧化碳排放量。

7. carbon dioxide capture and storage：二氧化碳捕获和储存 - 一种减少二氧化碳排放的技术，包括捕获工业或能源生产过程中产生的二氧化碳，并将其储存起来。

8. carbon dioxide injection：二氧化碳注入 - 一种地质碳捕获和储存技术，将二氧化碳注入地下岩石和土壤中，以减缓全球变暖的影响。

9. carbon dioxide sequestration：二氧化碳螯合 - 指将二氧化碳与土壤、水或岩石等自然体系结物结合，以减缓其在大气中的浓度。

10. carbon dioxide reduction：二氧化碳还原 - 指将大气中的二氧化碳还原为含碳化合物或固态碳的过程和方法。

总之，CO₂是一种重要的气体，它在化学、生物学、环境科学等多个领域都有广泛的应用和影响。

常用短语：

1. carbon dioxide (CO2) emissions

2. carbon dioxide capture

3. carbon dioxide injection

4. carbon dioxide sequestration

5. carbon dioxide reduction

6. carbon dioxide utilization

7. carbon dioxide emissions reduction

例句：

1. We must reduce our carbon dioxide emissions to protect the environment.

2. The company is investing in new technology to capture carbon dioxide from the exhaust gas.

3. The injection of carbon dioxide into the ground helps to stimulate the production of oil and gas.

4. The government is committed to the sequestration of carbon dioxide from power plants.

5. Our company"s goal is to reduce carbon dioxide emissions by 20% by 2020.

6. Carbon dioxide utilization could be a key solution for reducing greenhouse gas emissions.

7. We must take action now to reduce the impact of climate change, including reducing carbon dioxide emissions.

英文小作文：

Carbon Dioxide and Its Impact on the Environment

Carbon dioxide is a greenhouse gas that contributes to climate change and global warming. It is emitted into the atmosphere through various sources, such as fossil fuel combustion and deforestation. As a result, we are facing increasingly severe weather patterns and environmental challenges.

One way to mitigate the impact of carbon dioxide is to reduce its emissions through various measures, such as using renewable energy sources, implementing energy-efficient technologies, and planting more trees to absorb carbon dioxide. Additionally, carbon dioxide utilization could be a key solution for reducing greenhouse gas emissions, as it can be used for various purposes, such as enhanced oil recovery and industrial processes.

Ultimately, we must work together to protect our environment and ensure a sustainable future for future generations. Reducing carbon dioxide emissions and promoting sustainable practices are essential steps towards a healthier planet.