take a tumble

例句：

1. 1. She tumbled over in the snow.
   她在雪中摔了一跤。
2. 2. The old man tumbleddown the stairs.
   老人从楼梯上摔了下来。
3. 3. The baby tumbled into the pooland started to cry.
   婴儿跌进了游泳池，开始哭了起来。