Study of the impact of human activity on ecological environment and the counter-action of environment changes on mankind in Minqin Basin of Gansu--Based on a social investigation in是什么意思_Study of the impact of human activity on ecological environment and the counter-action of environment changes on mankind in Minqin Basin of Gansu--Based on a social investigation in在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句