Glucose is usually used as a carbon source for fermentation.

葡萄糖通常是发酵的碳源。

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The discovery reverses what was thought of as a carbon sink into a carbon source.

相反那些被发现的碳类物质进入到地下使碳汇变成碳源。

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During the biodegradation process, Tween 80 can be utilized by microbe as a carbon source.

在与菲共同降解的过程中，吐温80亦能作为碳源被降解微生物利用。

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In 2005, severe drought in the Amazon region saw widespread wildfires that turned the rainforest into a carbon source.

CNN: Drought-stressed trees face race to adapt

Canada's beetle-plagued forests are a net carbon source.

ECONOMIST: A special report on forests

Some applaud it as a lower-carbon source of electricity.

WSJ: Daniel Yergin on the Shale Gas Revolution: Stepping on the Gas