Ozonation
[化] 臭氧化; 臭氧化作用
🗣️ 情景例句
10 percent down and the balance at the time of shipment?
百分之十付现款，余额在装运时付清吗？
Who is the auther of this play?
谁是这戏剧的作者？
No littering on the campus.
在校园内不准乱丢废物。