| 1. | The lungs absorb oxygen from the air and give the blood the oxygen it needs and relieve it of carbon dioxide . |
| 肺从空气中吸入氧气，为血液提供所需要得氧气，并帮助排除二氧化碳。
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| 2. | Carbon dioxide attacks the lining of your stomach. |
| 二氧化碳会侵蚀胃臂。
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| 3. | Observations do not indicate that cloud nucleus concentrations parallel those of sulphur dioxide . |
| 观测没有表明云核浓度与二氧化硫浓度相关。
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| 4. | Soft drinks contain carbon dioxide . |
| 软饮料中含有二氧化碳。
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| 5. | weak acid made by dissolving carbon dioxide in water |
| 碳酸
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