Officials in China have started using drones equipped with speakers to warn citizens to wear masks as coronavirus continues to spread in the country.
원문출처 : https://www.cnn.com/videos/health/2020/02/01/china-talking-drones-coronavirus-nr-vpx.cnn
원문출처 : https://www.cnn.com/videos/health/2020/02/01/china-talking-drones-coronavirus-nr-vpx.cnn