全球碳循环研究中发现，目前已知碳源与碳汇不能达到平衡，存在一个很大的碳失汇。
It is found that there is a large missing carbon sink between available carbon source and sink by studies of global carbon cycle.
全球碳循环研究中发现，目前已知碳源与碳汇不能达到平衡，存在一个很大的碳失汇。
It is found that there is a large missing carbon sink between available carbon source and sink by studies of global carbon cycle.
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