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。
〈喻〉 急转突变
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a terrific roller coaster of a book .一本书中绝妙的急转突变事件。
move, change, or occur in the dramatically changeable manner of a roller coaster
大起大落;急转突变
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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。