Our sales forecast is uncertain because consumer demand has been fickle this quarter.

由於本季消費者需求反覆無常，我們的銷售預測並不確定。

The airline warned travelers that fickle weather could delay flights out of Taipei.

航空公司提醒旅客，反覆無常的天氣可能導致從台北出發的班機延誤。

Investors grew nervous as the fickle stock market rose and fell within hours.

股市在幾小時內暴漲暴跌、反覆無常，讓投資人越來越緊張。