| 单词 | roller coaster |
| 释义 | roller coaster roller coaster n.（名词）1. A steep, sharply curving elevated railway with small open passenger cars that is operated at high speeds as a ride, especially in an amusement park.翻滚过山车, 云霄飞车：一种上有敞篷的小型车厢且快速行驶的有急转弯的大坡度高架轨道，尤指游乐园中的乘坐装置2. Something, such as an action, event, or experience, that is marked by abrupt, extreme changes in circumstance, quality, or behavior:急转突变的行为、事件或经历：指环境、品质或行为上发生了突忽而极端变化的东西：“the demographic roller coaster caused by the baby boom”(&b{American Demographics})“由于出生率激增而引起的人口统计学上的急转突变事件”(美国人口统计数据) |
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