The auditor suspected real mischief behind the missing invoices and alerted the finance director.

稽核員懷疑遺失的發票背後藏有惡意，於是通知了財務長。

Security staff were trained to spot mischief in emails pretending to come from the CEO.

保全人員受過訓練，能識破假冒執行長名義的電子郵件中的惡意。

The hotel manager said the fake reviews showed pure mischief from a jealous competitor.

飯店經理表示，那些假評論純粹是眼紅的競爭對手出於惡意所為。