常見例句雙語例句Bicollateral bundle The arrangement of tissues in the vascular bundles in which the phloem is situated on both sides of the xylem.是初生木質(zhì)部的內(nèi)，外方都有初生韌皮部分布的一種維管束排列方式。http://www.chazidian.comThe primary structure of hypocotyl consists of epidermis, cortex, vascular bundle, pith and pith rays, vascular bundle belongs to bicollateral bundle.下胚軸的初生結(jié)構(gòu)由表皮、皮層、維管束、髓和髓射線等構(gòu)成，維管束為雙韌型； 返回 bicollateral vascular bundle