That, though, should have set alarm bells ringing for her because the royals do not have long engagements.

这当时并没有让她提起警惕，因为王室并没有长时间订婚的先例。

youdao

This has set the alarm bells ringing in Moscow.

这已给莫斯科拉响了警报。

《柯林斯英汉双解大词典》

If he set his alarm clock for midnight, it would wake the whole house.

如果他把闹钟设定在午夜，铃声会把全家人都吵醒。

《柯林斯英汉双解大词典》

Scottish Retail Consortium director Ian Shearer said the decline in sales had "set alarm bells ringing" for Scottish retailers.

BBC: Scottish retail sales suffer worst slump since 1999

"The position in which Pembrokeshire County Council finds itself will set alarm bells ringing throughout local government, " the authority said.

BBC: Older person

In other words, the existence of big winnings would surely have set alarm bells ringing that the offsetting nets were fictitious.

BBC: The how but not why of UBS's losing bets