它们消耗二氧化碳，并释放氧气。
在老鼠吸入氢硫化物十分钟后，它们对氧气的消耗和产生的二氧化碳量下降，并且一直保持极低的水平只要这种气体一直在控制中。
The mice's consumption of oxygen and production of carbon dioxide dropped ten minutes after they began inhaling hydrogen sulphide and remained extremely low as long as the gas was administered.
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