只有医生知道管理治疗病人获得100%的氧气或空气。
Only the physician administering treatment knew whether the patients were receiving 100% oxygen or air.
由于更重要的发酵只发生在有氧条件下的氧气或空气好电源(无菌)是必要的。
Since the more important fermentations occur exclusively under aerobic conditions a good supply of oxygen or air (sterile) is needed.
当物质在氧气或空气中燃烧时，物质或者全部氧气、或者某些成分氧化，其余成分则未受影响。
When a substance burns in Oxygen or air, either it is oxidized, or some of its constituents are oxidized, the others not being affected.
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