Cavity wall
[医] 洞壁
📖 牛津释义
cavity wall
wall consisting of two separate walls with a space between, designed to give extra insulation 夹壁墙（两道墙中间有空隙, 用以增强绝缘性）.
🧩 词语组成解析
🗣️ 情景例句
Yes, indeed.
对 ，正需要。
It's urgent to improve the packing.
必须马上改进包装。
Old tunes are sweetest and old friends are surest.
老调最甜美，老友最可靠。