Zirconium-aluminium getter pump is a new type of vacuum installation, in which the non-evaporable getter material is used to absorb the active gases.

锆铝吸气泵是利用非蒸散型吸气剂吸附活性气体的一种新型真空设备。

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At the same time, due to active gases (such as oxygen), as well as the presence of air bubbles generated when the local condensation heat, resulting in electrochemical corrosion of metal surface.

同时，由于活泼气体(如氧气)的存在以及气泡凝结时产生的局部高温，导致金属表面发生电化学腐蚀。

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These so-called active, or activated, charcoals are widely used to adsorb odorous or coloured substances from gases or liquids.

这些所谓的活性或活化炭广泛用于吸附气体或液体中的有味或有色物质。

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And it's believed that the high chemical reactivity of the surface is due to the deposition of chemically active gases from the atmosphere onto the surface, gases like hydrogen peroxide and ozone.

NPR: Revisiting the Viking Missions to Mars

It will study chemically active gases.

NPR: Revisiting the Viking Missions to Mars

Greenhouse gases are not the only climatically active ingredients that industry, farming and land clearance add to the atmosphere.

ECONOMIST: The science of climate change