以下为句子列表：
英文: A series of standard solution made up with standard substance of sodium carbonate, and combusted in a high-frequency induction furnace with pure oxygen, and the amount of total carbon was measured by infrared absorption.
中文: 摘要以碳酸钠为基准物质，配成一系列标准溶液，在通有纯氧气的高频炉中燃烧，红外吸收法测定碳含量，绘制校准曲线，测定矽中总碳量，与推荐值基本一致，方法准确、结果满意。
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英文: Another major concern is the environmental impact of transport, which accounts for roughly 25% of total carbon dioxide emissions.
中文: 另一个主要问题就是交通对环境的影响，这约占总二氧化碳排放量的25%。
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英文: Total oxygen consumption, total carbon dioxide output and total nitrogen (urine nitrogen + skin nitrogen) excretion are related to the oxidation of the three major nutrients and the physiological combustion values of the three nutrients are already known.
中文: 总氧消耗、总二氧化碳排出和总氮（尿氮＋皮肤氮）排出与三大营养素的氧化有关，并且这三种营养素的生理燃烧值是己知的。
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