underfloor

例句：

1. 1. The engineer inspected the underfloor for any signs of water damage.
   工程师检查了地板下是否有水损的迹象。
2. 2. The construction crew was working underfloor to install new flooring.
   建筑工人正在地板下安装新的地板。
3. 3. The underground tunnels are used for transportation and storage purposes.
   地下隧道用于运输和存储目的。