Fuel prices vacillated sharply this quarter, making our shipping budget hard to predict.

本季燃料價格劇烈波動，讓我們的運費預算難以預估。

The client's interest seemed to vacillate throughout the meeting, rising and falling with each slide.

整場會議中，客戶的興趣似乎隨著每張投影片時高時低、起伏不定。

Exchange rates have been vacillating all week, so travelers should check before booking hotels abroad.

匯率整週都在波動，所以旅客訂國外飯店前最好先確認一下。