The occurrence of grassland fire in Gansu closely related to climate, coverage of plant community and aboveground combustible materials, and the fire source was mainly ignition and artificial.是什么意思_The occurrence of grassland fire in Gansu closely related to climate, coverage of plant community and aboveground combustible materials, and the fire source was mainly ignition and artificial.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句