rib of floor

例句：

1. 1. The engineermeasured the ribs of the floorto ensure it was level.
   工程师测量了地板的肋条以确保它水平。
2. 2. The furnituredesigner added a decorative rib to thefloor for an extra touch of style.
   家具设计师在地板上增加了一个装饰性的肋条，以增加风格感。
3. 3. The construction crewcarefully removed the old ribs fromthe floor before installing the new one.
   建筑工人小心翼翼地从地板上移除旧的肋条，然后安装新的。