地板门

例句：

1. 1. The floor door is a crucial component of the security system.
   地板门是安全系统的一个关键组成部分。
2. 2. The engineers had to install a new floor door to fix the leaky roof.
   工程师们不得不安装一个新的地板门来修复漏水的屋顶。
3. 3.The floor door was designed to provide easy access to the basement.
   地板门设计为便于进入地下室。