The sudden drop in quarterly sales dumbfounded the entire finance team during the review.

季度銷售額突然下滑，讓整個財務團隊在檢討會上百思不解。

Customers were dumbfounded by the new billing system's confusing monthly statements.

客戶對新帳單系統那令人困惑的月結單感到一頭霧水。

The missing shipment dumbfounds our logistics manager, since the tracking shows it was delivered.

那批遺失的貨物讓我們的物流經理想不通，因為追蹤紀錄顯示已送達。