become flat

例句：

1. 1.The road became flat after the rain.
   雨后，这条路变得平坦了。
2. 2.The table was flattened by the heavy object.
   这个重物把桌子压得扁平了。
3. 3. The grass has been flattened by the wind.
   风吹过后，草地变得平坦了。