His capacity for roughhousing was infinite : it was as if the toughness and dexterity of a nine-year-old had been squeezed into a three-year-old 's body .
他调皮捣蛋的能力无穷无尽，仿佛一个九岁男孩的强悍和灵活被塞进了一个三岁的身体。
A couple of boys were roughhousing each other in the park .
几个男孩正在公园里彼此打闹。
This means frequently stepping out of your comfort zone to meet his needs , including roughhousing and playing with your son any way you can .
