The diurnal variation of Pn on cloudy day and the nebulous day is the unimodal curve.The photosynthetic rate in July is better than September;the diurnal variation of Pn is the bimodal curve.是什么意思_The diurnal variation of Pn on cloudy day and the nebulous day is the unimodal curve.The photosynthetic rate in July is better than September;the diurnal variation of Pn is the bimodal curve.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句