就总体而言，二氧化碳排放的自然过程是相当慢的，这便意味着，在对二氧化碳放任不管的情况下，大气层中二氧化碳含量在很长时间内都会持续增加。

THE natural processes which dispose of carbon dioxide are, in aggregate, rather slow, which means that an increase in the atmosphere’s carbon-dioxide level will, left to itself, last a long time.

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由于出口商品产生的二氧化碳排放的年增长速度是4.3%，快于GDP或总体上的碳排放的增长速度，慢于国际贸易。

The annual growth of CO2 emissions from exported products was 4.3%-faster than GDP or carbon emissions in general, slower than world trade.

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其催化速率十分慢，也不善于区分二氧化碳和氧。

Its catalytic rate is exceptionally slow and it is not good at distinguishing between CO2 and oxygen.

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