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
이 책의 역자이교지는 독자에게 중요한 정보를 제공합니다.i chaeg-ui yeokjaigyohaji-neun dogja-ege jungyohan jeongboreul jegonghamnida.The translator's note in this book provides important information to the reader.