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
법의 소급력은 특정 사건에 대해 적용될 수 있습니다.beob-ui sogeupnyeok-eun teugjeong sageon-e daehae jeog-yongdoel su issseubnida.The retroactivity of the law can be applied to specific cases.