Effects of plastic film mulch and pre-sowing soil water on growth and yield of spring wheat in semi-arid areas of Loess Plateau是什么意思_Effects of plastic film mulch and pre-sowing soil water on growth and yield of spring wheat in semi-arid areas of Loess Plateau在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句