flat strip slate pencil

例句：

1. 1. The floor is very flat and smooth.
   地板非常平坦光滑。
2. 2. The table is flat enough to put a book on it.
   桌子足够平坦，可以放一本书在上面。
3. 3.Flatten out the pizza before baking.
   烘烤前将比萨饼压平。