尽管目前国内外对主要的温室气体源与汇研究报道很多，但不同的研究结果不尽一致，有些研究间甚至出现相反的结论。
In spite of a lot of studies on the source and sink of greenhouse gases reported, the different researches get different or even contrary conclusions.
泥炭地是一个巨大的碳库，是温室气体的源或汇。
Peatland is a large carbon reservoir, which can act as a source or sink of greenhouse gases.
农田既是主要的温室气体排放源之一，也是潜在的碳汇。
Cropland is one of the greenhouse gas emission sources, but also a possible sink at the other side.
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