knock about together

例句：

1. 1. They often knock about together after school.
   放学后他们经常一起打闹。
2. 2.The kids are playing roughhouse in the park.
   孩子们在公园里玩起了捉迷藏。
3. 3. She was playing roughhouse with her friends when she fell and hurt herself.
   她和朋友一起玩捉迷藏时摔伤了自己。