structural shale

例句：

1. 1. The structural shale is akey component of the geological formation.
   结构岩层是地质构造的关键组成部分。
2. 2. Thestructural shale is used in the constructionof buildings and roads.
   结构岩层用于建筑和道路的建设。
3. 3. The structural shaleis also known for its ability to absorbsound waves.
   结构岩层还因其吸收声波的能力而闻名。