oxygen-enriched air的用法和樣例：
例句
- However, direct use of oxygen, or enrichment of the air with oxygen, is necessary for some processes.
但是對于某些過(guò)程，直接使用氧或富氧空氣是必要的。 - Occasionally enriched air or supple mental oxygen is available and a greater ratio of secondary reforming to primary reforming is possible.
偶爾有富氧空氣或補充氧的，因而二段轉化對一段轉化的大比例是可能的。
