常見例句The adventitious root is triarch,and has the secondary structure. 不定根爲三原型,具次生結(jié)搆。Root which was diach, triarch and tetrarch was comprised of epidermis, cortex and stele. 根爲二、三和四原型,由表皮、皮層和中柱3部分組成;The results showed that the primary xylem of the root is diarch, triarch and tetrarchy; 結(jié)果表明:根的初生木質(zhì)部爲二原型、三原型和四原型; 返回 triarch