Definition
The practice of using multiple precautions or measures to ensure success or safety, often more than what is strictly necessary.
雙重保險，力求完备
To ensure data security, we not only backed up the hard drive but also stored all files in the cloud, which is a case of belt and braces.
為了確保數據安全，我們不僅備份了硬碟，還將所有文件存儲在雲端，這是一個雙重保險的做法。
He sent an email and a text message; it was belt and braces to make sure I received the notification.
他發了一封電子郵件和一條短信；這是雙重保險，確保我收到通知。
We had two editors proofread the report before its release; it was a belt and braces approach.
我們在報告發布前請了兩位編輯進行校對；這是一種雙重保險的方法。