flat wise bend

例句：

1. 1. Thefloor is very flat and easy to clean.
   地板非常平坦，容易清洁。
2. 2. The roofof the house is flat, which makesit easy to access the attic.
   房子的屋顶是平的，这使得进入阁楼变得容易。
3. 3. Theflat iron is a usefultool for straightening hair.
   直发器是一个有用的工具，用于整理头发。