roller skate ( roller-skating, roller-skated, roller-skates, roller skates )

• 1. 

  N-COUNT Roller skates are shoes with four small wheels on the bottom. 双排四轮旱冰鞋

  例：

  A boy of about ten came up on roller skates.

  一个大约十岁的男孩穿着双排四轮旱冰鞋滑了过来。

• 2. 

  V-I If you roller-skate, you move over a flat surface wearing roller skates. 滑旱冰

  例：

  On the day of the accident, my son Gary was roller-skating outside our house.

  在出事的那天，我的儿子格雷正在我们家外面滑旱冰。