Dryland does most in global carbon cycling because it occupies 40% of the earths surface.

干旱土壤占全球陆地总面积的40 %，因此，它在全球碳循环中占有重要的地位。

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Wetlands is the important part of terrestrial ecosystem, and plays a significant role in global carbon cycling.

湿地是陆地生态系统的重要组成部分，在碳的储存中起着重要作用。

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Soil carbon cycling in wetlands largely affected global carbon cycling and also possibly global climatic changes.

湿地土壤碳的循环对全球大气碳的收支平衡以及全球气候变化可能产生重大影响。

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