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
무효론은 법적 효력이 없는 계약을 설명하는 이론이다.Muhyoron-eun beobjeok hyoregi eobsneun gyeyag-eul seolmyeonghaneun il-eonida.The theory of nullity explains contracts that have no legal effect.