It used to be that you had to go to a classroom, and there would be some diligent teacher -- some genius teacher in there -- but that person was only in there at certain times and you had to go then, and then was not most times.
한때는 교실에 가야 했죠. 부지런한 선생님도 계시고 천재적인 선생님도 계시고 하지만 그 사람은 그곳에 특정 시간에만 있고 그 시간에만 가야했죠. 그리고 그 시간은 많지 않았고요.