The system upgrade will occur over the weekend, so please save your files by Friday.

系統升級將在週末進行，所以請在週五前儲存你的檔案。

Delays may occur if the shipment is not cleared through customs on time.

如果貨物未能及時通關，可能會發生延誤。

The predicted rise in interest rates finally occurred in March, affecting our loan costs.

預測中的利率上升終於在三月發生，影響了我們的貸款成本。