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
해운업은 세계 경제에 중요한 역할을 합니다.haeun-eob-eun segye gyeongje-e jungyohan yeoghal-eul hamnida.The shipping industry plays an important role in the global economy.