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
도서관에서 책을 찾으려면 도서정리번호가 필요합니다.doseogwaneseo chaegeul chajuryeomyeon doseojeonglibunhoga piryohamnida.To find a book in the library, you need the call number.