The paper studied the distribution of humus carbon in soils sections and the characteristics of humus carbon fraction of purple paddy in Mid-Sichuan Hilly Region.

研究了川中丘陵区紫色水稻土土壤腐殖质碳的剖面分布及其组成特征，探讨了土壤腐殖质与活性有机碳、土壤全氮含量的关系。

youdao

Congress seems determined that a proposed cap-and-trade system for carbon emissions, which Mr Obama was counting on to raise hundreds of billions of dollars, will raise only a fraction of that.

虽然奥巴马曾指望靠“二氧化碳排放总量管制和交易系统”来筹集大笔大笔的资金，但似乎国会笃定这一提案所能筹得的只是杯水车薪而已。

youdao

The thermal conductivity of the composite is not only dependent on the volume fraction, but also the arrangement of carbon fiber.

这类复合材料的热传导性能主要取决于其组成中的碳纤维含量与排布方式。

youdao

In fact, such rate cuts would require only a fraction of carbon revenues if lawmakers also identify some significant tax breaks to go after.

FORBES: Could A Carbon Tax Be The Key To Achieving Corporate Tax Reform?

But about half of that increase came before 1940, when carbon dioxide emissions were a fraction of the level they are today.

FORBES: Fact and Comment

The declaration commits the 11 signatory nations to a goal of carbon neutrality, even though their collective carbon emissions are a tiny fraction of the global total.

BBC: Poor nations vow low-carbon path