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
상위 직급에 있는 사람들은 더 많은 책임이 있습니다.sangwi jikgeub-e inneun saramdeul-eun deo manheun chaegim-i issseubnida.People in higher ranks have more responsibilities.