When the projector failed, our sales director had to extemporize for twenty minutes.

投影機故障時，我們的業務總監不得不即興發揮了二十分鐘。

The tour guide extemporized a new route after the museum unexpectedly closed for repairs.

博物館突然因整修而閉館後，導遊臨時即興規劃了一條新路線。

Customer service agents should follow the script rather than extemporizing answers about refund policies.

客服人員在回答退款政策時應依照腳本，而不是即興亂答。