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
발효균은 음식의 발효 과정에서 중요한 역할을 합니다.balhyo-gyun-eun eumsik-ui balhyo gwajeong-eseo jungyohan yeoghal-eul hamnida.Fermenting bacteria play an important role in the fermentation process of food.