The new clerk's ineptitude with the billing software caused several invoice errors this week.

新來的職員對帳單軟體操作不熟練，這週造成了好幾筆發票錯誤。

Customers complained about the driver's ineptitude in loading fragile packages onto the truck.

顧客抱怨司機把易碎包裹搬上貨車時笨手笨腳。

The manager blamed the failed presentation on the intern's ineptitude with the projector.

經理把簡報失敗歸咎於實習生不會操作投影機。