panplain

例句：

1. 1.The floor is very panplain.
   地板非常平整。
2. 2.The car was parked on a panplain surface.
   汽车停在一个平坦的表面上。
3. 3.The table is panplain, which makes it easy to clean.
   桌子很平，这使得清洁变得很容易。