In effect, free-living nitrogen-fixing organisms are in situ green manures since most N derived from BNF is released to the soil solution only after cell death.是什么意思_In effect, free-living nitrogen-fixing organisms are in situ green manures since most N derived from BNF is released to the soil solution only after cell death.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句