| 词汇 | cavity wall | 
| 释义 | cavity wall  noun [ C ] uk/ˌkæv.ɪ.ti ˈwɔːl/ us/ˌkæv.ə.t̬i ˈwɑːl/  (防湿防寒的)空心墙,夹层墙 a wall of a building formed from two walls with a space, usually for air, between them. It is made in this way to keep out water and cold air. | 
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