tumbling-box washing machine

例句：

1. 1.The ball tumbled down the hillside.
   球滚下山坡。
2. 2.The car's engine is making a tumbling sound.
   汽车引擎发出隆隆声。
3. 3. The leaves of the tree are tumbling to the ground.
   树叶在风中翻滚着落下来。