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
실학은 조선 시대에 중요한 학문이었습니다.Silhak-eun Joseon sidae-e jungyohan hakmun-i-eossseubnida.Practical learning was an important field of study during the Joseon Dynasty.