(military) anti-aircraft gun, anti-aircraft cannon

to study / to learn

firing at the target in the sky from ground

to fire at the target in the sky from ground

maneuver, operate

operate (machinery)

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

cannon, artillery