Our shipping costs have been erratic this quarter because fuel prices keep changing.

由於燃料價格不斷變動，我們這一季的運費起伏不定。

The new printer's erratic behavior has delayed several important client reports this week.

新印表機運作不穩定，這週已經延誤了好幾份重要的客戶報告。

Customers complained that the store's erratic opening hours made planning visits difficult.

顧客抱怨這家店的營業時間反覆無常，讓他們很難安排前往。