in the field

介词短语prepositional phrase

1. 1(military) Actively engaged in fighting or dealing with the enemy; in battle or on maneuvers.
2. 2Away from the office, classroom, or laboratory; working with people or things in their natural environment.
3. 3In a real-world setting, as opposed to the controlled conditions of a laboratory or the hypothesized parameters of a theoretical approach.
4. 4Used other than figuratively or idiomatically: see in,‎ field.