n.滚筒,滚压机,定型卷夹,塑料发卷,巨浪
A boy of about ten came up on roller-skates.
一个10岁左右、脚蹬旱冰鞋的男孩滑了过来。
I've been on an emotional roller-coaster since I've been here.
自从我到了这里,情绪就起伏不定。
The craze for roller skating spread throughout the U.S.
滑旱冰在全美风靡一时。