短語詞組短語vascular r bundle 維管束鞘amphivasal vascular bundle [植]周木維管束;周木型維管束bicollateral vascular bundle [植]雙韌維管束;雙韌型維管束open vascular bundle [植]開放維管束;開放式微管束Vascular Bundle plant 維管束植物radial l vascular bundle 輻射維管束definite vascular bundle 有限維管束;閉鎖維管束;封閉維管束vascular bundle sheath cells 維管束鞘細(xì)胞;維管鞘細(xì)胞amphivasal concentric vascular bundle 外木包圍維管束;周木維管束 返回 vascular bundle