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。

On the way out a boy of about ten came up on roller skates.

在出去的路上，一个大约十岁的男孩穿着旱冰鞋滑了过来。

May I borrow your roller skates?

我可以借你的旱冰鞋吗？

When were roller skates invented?

滚轴溜冰是什么时候发明的？

I'll go with you on my roller skates.

那你带著滑板，我穿溜冰鞋跟你去。