It may be the result of the normal process of senescence, lack of key minerals for chlorophyll synthesis (particularly iron and magnesium), or disease.是什么意思_It may be the result of the normal process of senescence, lack of key minerals for chlorophyll synthesis (particularly iron and magnesium), or disease.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句