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
기술의 고속화는 산업 발전에 큰 영향을 미쳤다.gisul-ui gosokhwa-neun saneop baljeon-e keun yeonghyang-eul michyeotda.The acceleration of technology has had a significant impact on industrial development.