Ozone is a highly reactive form of oxygen gas.

臭氧是一种高度活跃的氧气形态。

《柯林斯英汉双解大词典》

These atoms recombine in pairs during the night to form molecules of oxygen gas.

在夜间，这些氧原子再成对地结合成氧气分子。

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When a ball valve is closed in periods of inactivity, the bleach will decompose over time liberating oxygen gas.

当球阀在不工作期间关闭，经过一段时间，漂白剂将分解并释放出氧气。

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Hyperbaric oxygen therapy for gas gangrene generally lasts about 90 minutes.

CNN: Gangrene

Bolt comes with a trick-looking two-into-one exhaust system, which includes an oxygen sensor and exhaust gas catalyst that works with the closed-loop fuel injection system.

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Clusters of zinc atoms then mix with a reactive gas, usually oxygen, and cool to a solid.

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