be a mystery to somebody
成語所屬單字mystery
be a mystery to somebody — 慣用語
1. to be something that someone cannot understand or explain
1.慣用語
釋義
對某人來說是個謎
to be something that someone cannot understand or explain
例句
Why Inês decided to leave her job is a mystery to everyone in the office.
The way he fixed the old radio in five minutes is a mystery to me.