in action

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

в действии, в работе

doing something or operating, rather than being still or inactive

:
It's great to see the new machine in action.
Приятно видеть новую машину в действии.
The coach likes to see his players in action during practice.
Тренер любит видеть своих игроков в действии во время тренировки.