Is it a big hunk of iron, or is it mostly crumbly carbonaceous s tuff?

它是一大块铁，还是主要由易碎质物质构成？

Carbon-rich soil is dark, crumbly and fertile, and retains some water.

质丰富土壤颜色很深，易碎且肥沃，而且还能留住一些水分。

Tons of carbon have been stripped from the world's soils — where it's needed — and pumped into the atmosphere.

大量都被从地球土壤中剥离了出，灌进了大气中，但是土壤才是需要质地方。

When humans started draining the natural topsoil, and ploughing it up for planting, they exposed the buried carbon to oxygen.

当人类耗尽自然表层土并开始为了耕种而犁田时，他们就把土壤中掩质暴露在了氧气中。

The stone was of a type called a carbonaceous chondrite.

这块石头属于一种叫做质球粒陨石类型。

Jones and 12 farmers are working to build up soil carbon by cultivating grasses that stay green all year round.

Jones和12位农民正在一起通过培育全年常绿草增加土壤中质。

There he met a pioneer in the study of global warming, who suggested that carbon from the soil had moved into the atmosphere.

他在那儿遇见了一位研究全球变暖先驱，这位研究人员提出，土壤中质都挥发进大气里了。

They said that they had found remnants of carbonaceous chondrites on the moon's far side in hyperspectral images in the visible and near-infrared range taken by the rover.

他们说，在月球车拍摄可见光和近红外范围内高光谱图像中，他们发现了在月球背面质球粒陨石残留物。

Rattan Lal argues that farmers should receive payment not just for the corn or beef they produce but also for the carbon they can store in their soil.

Rattan Lal认为农民应该不仅从他们生产玉米和牛肉中获利，还应该为他们在土地中能够储存质获得报酬。