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
그의 고안력은 문제를 해결하는 데 큰 도움이 되었다.geuui goanryeok-eun munje-reul haegyeolhaneun de keun doumi doeeotda.His ingenuity was a great help in solving the problem.