During the crisis, oil prices fluctuated between $20 and $40 a barrel.

在危机时期，每桶石油价格在20元至40元之间波动。

He fluctuated between hopes and fears.

他在希望和恐惧中徘徊。

He fluctuated between hope and despair.

他时而充满希望时而失望。

Asian shares gained while U.S. index futures fluctuated.

亚洲股市走更高，美股期货波动。

We had already perceived how the temperature fluctuated.

我们已经注意到温度的波动情况。