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
디플레이션의 영향은 경제에 심각한 문제를 일으킬 수 있다.dipeulleisyeon-ui yeonghyang-eun gyeongje-e simgakhan munje-reul ilheul su itda.The effects of deflationary pressures can cause serious problems in the economy.