Final answer:
Trucking a camera refers to lateral movement, not movement toward or away from an object. To move closer or further, 'dolly in' or 'dolly out' are the correct terms. Focus is achieved by changing the lens-to-film distance to accommodate different object distances, thus a fixed lens distance would not provide clear images at varying distances.
Step-by-step explanation:
When you truck a camera, it refers to moving the camera laterally to the left or right relative to the subject. In filmmaking, trucking in means moving the camera closer towards the subject whereas trucking out means moving it away from the subject. Therefore, the statement in the question seems to have a typo or is malformed; trucking does not directly pertain to moving towards or away from an object, which rather would be described as dolly in or out.
As for camera focus, adjusting the distance of the lens from the film allows the camera to focus on objects that are at different distances. A fixed distance between the lens and the film would not allow this adjustment, leading to blurred images of objects that do not fall at the calibrated focus distance.