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
심폐 기능이 저하되면 건강에 문제가 생길 수 있습니다.simpae gineungi jeohadoemyeon geongange munje ga saenggil su itsseumnida.If cardiopulmonary function declines, health problems can arise.