墙壁材料应能够保护隐私，同时必须提供基本的保护。
Wall material must afford privacy and protection from the elements.
厚重的实体墙和天花板可以反射被普通墙壁材料吸收的低音区。
The heavy solid wall and ceiling can reflect the lower sound ranges which conventional wall materials absorb.
基本上简单的石工正在墙壁材料，强壮的在压缩中和相对地弱的在紧张方面。
Basically plain masonry is walling material, strong in compression and relatively weak in tension.
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