Nevertheless, the combinedcarbon content and isotope analyses of micro-carbonate in metamorphic rocks can be used to make a distinction in origin between sedimentary and igneous protoliths.
不过，变质岩中微量碳酸盐的碳含量和碳同位素比值分析能够对原岩类型提供有效的判别。
2
Contrary to the conventional view that human activities damage the environment, Glaser says, "Black carboncombined with human wastes is responsible for the richness of Terra Preta soils."
与人类活动破坏环境的传统观点相反，格拉泽说：“与人类排泄物结合的黑碳是黑土高地土壤肥沃的原因。”
3
The team suggests the loss of trees from the two droughts combined could offset the increases in carbon uptake the forest experienced during the intervening non-drought years.