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
단음계는 슬픈 감정을 표현하는 데 자주 사용됩니다.dan-eum-gye-neun seulpeun gamjeong-eul pyohyeonhaneun de jaju sayongdoemnida.The minor scale is often used to express sad emotions.