english: But if you haven't played with a battery and a bulb, if you've only seen a circuit diagram, you might not be able to do that, and that's one of the problems.
non_english: Ali ukoliko se niste igrali sa baterijom i sijalicom, ukoliko ste samo videli strujne šablone, onda možda niste u stanju to da uradite, i to je jedan od problema.