Thallus (pl. thalli) A simple plant body showing no differentiation into root, leaf, and stem and lacking a true vascular system.是什么意思_Thallus (pl. thalli) A simple plant body showing no differentiation into root, leaf, and stem and lacking a true vascular system.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句