aeration

aeration  

[ˌeiəˈreiʃən]

n.

通风

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1.To treat(sewage) with aeration and bacteria to aid decomposition.
净化污水运用通风及细菌对（污水）进行处理以帮助物质分解
来源： dj.iciba.com
2.(of sewage) treated with aeration and bacteria to aid decomposition
（指污水）做通风和细菌的处理以加速其分解
来源： dj.iciba.com
3.a farm implement used to break up the surface of the soil (for aeration and weed control and conservation of moisture).
用来打破土地表面的农用装置。
来源： dj.iciba.com