While this number plays an important role in the calculation of the Value Cost Ratio (VCR), it plays no useful role in understanding the economics of fertilizer application.是什么意思_While this number plays an important role in the calculation of the Value Cost Ratio (VCR), it plays no useful role in understanding the economics of fertilizer application.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句