Then the drill instructor pulls out his secret weapon-an infrared chin-up bar training device. The students, straining to lift their chins above the bar, cannot fool the keen infrared eye of the device.
教官搬出秘密武器──紅外線單槓訓練儀，想要咬牙翹起下巴矇混過關的學生，都逃不過紅外線的法眼。