The relative low content of bound water,soluble sugar, K + , Carotenoid and ABA in the leaf tissue of P. ponderosa was the internal cause of its weak cold resistance.是什么意思_The relative low content of bound water,soluble sugar, K + , Carotenoid and ABA in the leaf tissue of P. ponderosa was the internal cause of its weak cold resistance.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句