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
기상학자들은 투하존데를 사용하여 기온을 측정합니다.gisanghakjadeul-eun tuha jonde-reul sayonghayeo gion-eul cheugjeonghamnida.Meteorologists use dropsondes to measure temperature.