ballast mattress

例句：

1. 1.The ballast mattress is designed to provide a comfortable sleep surface.
   避雷器床垫设计用来提供一个舒适的睡眠表面。
2. 2. The ballast mattress has been proven to be an effective way to reduce noise pollution.
   避雷器床垫已被证明是一种有效的减少噪音污染的方法。
3. 3.The ballast mattress is often used in high-rise buildings to protect against lightning strikes.
   避雷器床垫通常用于高层建筑中，以保护免受雷击。