虽然174个国家批准了公认存在缺陷的《京都议定书》以降低碳排放水平，但美国和欧盟在这一问题上的分歧依然存在。
Although 174 nations approved the admittedly flawed Kyoto accords to reduce carbon levels, the arguments between the US and the EU on this issue still exist.
同样，同其它国家相比，由于广泛使用乙醇，巴西交通运输行业的碳排放水平较低。
Similarly, the Brazilian transportation sector is low - carbon in comparison to other countries, due to the widespread use of ethanol.
将武汉城市圈按照土地类型分为三类城市，收敛性分析发现它们均出现了不同程度的收敛，而且收敛于较高的碳排放水平。
Wuhan city circle could be divided into three categories according to the type of urban land. The results showed that they have suffered different degrees of convergence.
设置美国主要碳排放源的排放总额限制，相对于2005年的排放水平，到2020年削减17%，到2050年削减80%。
Reduces carbon emissions from major U. s. sources by 17% by 2020 and over 80% by 2050 compared to 2005 levels.
试验表明改进后的加热器低温点火能力明显提高，启动过程的碳烟排放水平显著降低。
The experiments found that the modification of the ignition place improved the cool-start ability and the added small holes reduced the soot emission during the starting process.
在燃烧后期，约70 ~ 80%碳微粒被再次氧化，此后微粒质量浓度接近于排放水平。
The soot particles are oxidized by about 70 ~ 80% in the late combustion phase. And then, the mass concentration of particulate equals to the concentration in the tail pipe.
在燃烧后期，约70 ~ 80%碳微粒被再次氧化，此后微粒质量浓度接近于排放水平。
The soot particles are oxidized by about 70 ~ 80% in the late combustion phase. And then, the mass concentration of particulate equals to the concentration in the tail pipe.
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