They roller-skate down the street.

他们在街上滑旱冰。

They can't roller-skate.

他们不能滑旱冰。

I have never learned how to roller-skate.

我从来没有学过滑旱冰。

I never learned how to roller-skate.

我从来没有学过溜滑轮。

You can shop, eat, ice skate, see a movie and ride on a roller coaster here.

在这里你可以购物、就餐、滑冰、看电影，还可以玩过山车。