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
의학적 연구는 새로운 치료법을 개발하는 데 중요하다.uihakjeok yeonguneun saeroun chiryobeob-eul gaebalhaneun de jungyohada.Medical research is important for developing new treatments.