cleance游隙cleanadj.干净的；纯洁的；完全的；空白的；正当的；精准的adv.完全地n.清洁v.打扫；清扫；擦，刷cleanout cover人孔盖cleaning fluid去渍油clean floating清洁浮动cleaning force清洗力cleaning screw放水器clean district洁净区clean thoughts思想干净Clean gasoline清洁汽油clean - fuel清洁燃料cleaning ditch壕沟清理