固定出口和入口狭缝。

Fixed entrance and exit slit.

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源地释放的碳能够被另一个地方的植物固定吸收吗，或者说碳可以从一个国家“出口”到另一个国家吗？

Should the re-incorporation of carbon into plant material happen where the carbon was emitted originally, or could it be ‘exported’ from one country to another?

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配额制度是在固定一段时间内对进出口商品所设置的上限。

A quota is an upper limit which is set on imports of a commodity for a fixed period of time.

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