be on the scene
US /biː ɑːn ðə siːn/
UK /biː ɑːn ðə siːn/

1.
在现场, 到场
to be present at a place where an event is happening
:
•
Police were quickly on the scene after the accident.
事故发生后,警察很快就赶到现场了。
•
When I arrived, the paramedics were already on the scene.
当我到达时,医护人员已经在现场了。