flat double guides

例句：

1. 1. The table is too flat to eat on.
   这张桌子太平了，不能吃。
2. 2. The car's wheels are flat, so it can't go over obstacles.
   汽车的轮子是平的，所以不能越过障碍物。
3. 3. The floor is flat and smooth, making it easy to clean.
   地板是平的且光滑，这使得清洁变得容易。