Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
기재학은 다양한 주제를 연구하는 학문입니다.gijaehak-eun dayanghan jujereul yeonguhaneun hakmun-imnida.The study of something is a discipline that researches various topics.