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
혐기성생물은 산소가 없는 환경에서 살아갈 수 있습니다.hyeomgiseongsaengmureun sansoga eobsneun hwan-gyeongeseo salagal su issseubnida.Anaerobes can survive in environments without oxygen.