in broad daylight
US /ɪn brɔd ˈdaɪt.laɪt/
UK /ɪn brɔd ˈdaɪt.laɪt/

1.
光天化日之下, 公开地
during the day, when it is easy to see what is happening, often used to express surprise or shock that something illegal or inappropriate occurred openly
:
•
The robbery happened in broad daylight, right on the main street.
抢劫案发生在光天化日之下,就在主干道上。
•
I can't believe they were arguing so loudly in broad daylight.
我不敢相信他们光天化日之下吵得那么大声。