腐生生物

xì bāo wài xiāo huà zuì jiǎn dān de tú jìng yě xǔ shì fǔ shēng shēng wù suǒ lì yòng de fāng fǎ

细胞外消化最简单的途径也许是腐生生物所利用的方法。

Perhaps the simplest approach to extracellular digestion is that employed by saprophytes.