layer of shale

• 夹层

layer of shale的用法和样例：

例句

1. The sandwich of boards is laminated using pressure and heat.
   夹层板通过加压加热的方法压制而成。
2. The secret to this whisper-thin yet very solid table is its unique steel-sandwich construction, which features a layer of wood.
   这个秘密耳语薄还非常坚实的表是其独特的钢夹层结构，其特点是层的木材。