belt and braces
成語所屬單字belt
belt and braces — 慣用語
1. doing more than is strictly needed in order to be completely sure that a plan or
1.慣用語
釋義
雙重保險；以防萬一
doing more than is strictly needed in order to be completely sure that a plan or system will not fail.
例句
Saving the file on the laptop and the cloud is belt and braces, but Nia prefers it that way.
The engineer added a second alarm as a belt-and-braces measure.