roller coaster
美[ˈroʊlə(r)] 网络滚筒；辊；滚子；滚轮
1 . 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。
来自柯林斯例句
2 . The craze for roller skating spread throughout the U.S.
滑旱冰在全美风靡一时。
来自柯林斯例句
3 . 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。
来自柯林斯例句
4 . The last few weeks have been a real roller coaster.
过去的几个星期，形势真是变幻莫测。
来自《权威词典》
5 . a pair of roller skates
一双旱冰鞋
来自《权威词典》
1.a grounder that rolls along the infield
2.a long heavy sea wave as it advances towards the shore
3.a small wheel without spokes (as on a roller skate)
4.a cylinder that revolves
5.a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it;
a woman with her head full of curlers is not a pretty sight
6.Old World bird that tumbles or rolls in flight; related to kingfishers
7.pigeon that executes backward somersaults in flight or on the ground