in action

US /ɪn ˈækʃən/
UK /ɪn ˈækʃən/
"in action" picture
1.

beraksi, sedang beroperasi

doing something or operating, rather than being still or inactive

:
It's great to see the new machine in action.
Seronok melihat mesin baharu beraksi.
The coach likes to see his players in action during practice.
Jurulatih suka melihat pemainnya beraksi semasa latihan.