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rollercoaster是什么意思？

rollercoaster

柯林斯高阶英汉双解学习词典释义
  • N-COUNT
    过山车;云霄飞车
    A roller-coaster is a small railway at a fair that goes up and down steep slopes fast and that people ride on for pleasure or excitement.
    例句
    It's great to go on the roller coaster five times and not be sick. 坐了5次云霄飞车都没晕，真是太棒了。
  • N-COUNT
    许多急转突变;忽好忽坏
    If you say that someone or something is on a roller coaster, you mean that they go through many sudden or extreme changes in a short time.
    例句
    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。 Over the last few years Japan's socialists have seen their electoral popularity take a roller-coaster ride. 在过去的几年里，日本社会党在选民中的支持率忽高忽低。