碳循环是循环中，碳是交换之间的水，大气，生物圈，地圈的地球。
The carbon cycle is the cycle in which carbon is exchanged between the hydrosphere, atmosphere, biosphere, and geosphere of the Earth.
土壤碳是全球碳循环中的重要组成部分，土地利用方式的改变对土壤碳的源和汇具有很大的影响。
Soil carbon is a significant component of global carbon cycling, the change of land use pattern has a great influence on soil carbon source or sink.
湿地生态系统具有很强的储碳、固碳能力，在全球碳循环中占有重要地位。
Wetland ecosystem has strong ability of carbon storage, carbon fixation and plays an important role in the global carbon cycle.
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