alarm bells are ringing
成語所屬單字alarm
alarm bells are ringing — 慣用語
1. used when signs of trouble make people start to suspect that something is wrong
1.慣用語
釋義
警鐘響起；情況不對勁
used when signs of trouble make people start to suspect that something is wrong and needs attention.
例句
When sales fell for the third month, alarm bells were ringing in finance.
If a stranger asks for bank codes by text, alarm bells should start ringing.