The auditors followed the paper trail to find where the missing funds had gone.

稽核人員循著書面紀錄的蹤跡，查出遺失的資金流向何處。

Please keep an email trail of all approvals so we can check decisions later.

請保留所有核准事項的電子郵件往來紀錄，方便我們日後查核決策。

The courier's tracking system leaves a digital trail showing every stop the package made.

快遞公司的追蹤系統會留下數位軌跡，顯示包裹經過的每一站。