roller skate

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

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

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。