Definition
The regular pattern of increase and decrease in the level or intensity of something.
起伏不定
The company's finances experienced an ebb and flow as the market conditions changed.
隨著市場狀況的變化，公司的財務狀況經歷了起起落落。
The number of tourists on the beach ebbs and flows daily.
海灘上的遊客數量每天都有起落。
Political support tends to ebb and flow during each election cycle.
政治支持度在每次選舉週期中往往會起起落落。