walk in on

US /wɑːk ɪn ɑːn/
UK /wɑːk ɪn ɑːn/
"walk in on" picture
1.

撞见, 闯入

to enter a room and see someone doing something private or embarrassing

:
I accidentally walked in on them while they were changing.
我无意中撞见他们正在换衣服。
She didn't want anyone to walk in on her while she was practicing her dance moves.
她不想在练习舞步时被任何人撞见