in action
US /ɪn ˈækʃən/
UK /ɪn ˈækʃən/

1.
beraksi, sedang beroperasi
doing something or operating, rather than being still or inactive
:
•
It's great to see the new machine in action.
Sangat menyenangkan melihat mesin baru beraksi.
•
The coach likes to see his players in action during practice.
Pelatih suka melihat para pemainnya beraksi selama latihan.