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- a fairground attraction that consists of a light railway track which has many tight turns and steep slopes on which people ride in small fast open carriages（游乐场的）环滑车道; 环滑车。
1.1
- figurative a thing that contains or goes through wild and unpredictable changes〈喻〉急转突变：
a terrific roller coaster of a book.
一本书中绝妙的急转突变事件。
(roller-coaster)(亦作roller-coast) no obj.
- move, change, or occur in the dramatically changeable manner of a roller coaster大起大落; 急转突变：
the twentieth century fades behind us and history roller-coasters on.
20世纪消失在我们身后, 历史将继续在变幻莫测中向前发展。