one by one
Y uno a uno los está dejando a todos atrás!
And one by one, he's leaving them all behind!
— Bhaag Milkha Bhaag (2013)
John cogió los artículos uno a uno y los examinó.
John picked up the items one by one and examined them.
Uno a uno los traficantes del barrio Tanque iban a morir.
One by one, the drug dealers from the Tanque neighborhood were going to die.
— Tropa de élite 2 (2010)