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
그는 색맹이라서 빨간색과 초록색을 구별할 수 없다.geuneun saengmaengiraseo ppalgansaekgwa choroksaek-eul gubyeolhal su eopda.He is color blind, so he cannot distinguish between red and green.