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
외래종은 생태계에 큰 영향을 미칠 수 있습니다.oelaejon-eun saengtaegye-e keun yeonghyang-eul michil su issseubnida.Invasive species can have a significant impact on ecosystems.