To describe a situation that undergoes rapid, unpredictable, and often dramatic changes; to be characterized by instability and fickleness.
市场的变化真是苍黄翻覆，前一天还繁荣兴旺，第二天就可能行情低迷。
The market changes are truly dramatic and unpredictable; one day it's thriving, and the next it could be sluggish.
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