A research on the pattern to improve the structure of farming-stockbreeding in arid area --A case study of the middle and upper reaches of Heihe River valley是什么意思_A research on the pattern to improve the structure of farming-stockbreeding in arid area --A case study of the middle and upper reaches of Heihe River valley在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句