n.清洁,干净
Keep cleanness, wear soft and cleanness shoes when walking on the floor.
保持地板的清洁, 人在地板上行走时须穿干净软底鞋.
All people like cleanness.
人们都是愿意干净的.
He preferred the cleanness and tidiness of the wild sod.
他喜欢荒野草地的清洁和整齐.