1·But the very end of such a network, the leaf, has a different architecture. Unlike the xylem and phloem, the veins in a leaf cross-link and loop.
但网络的最边缘——叶子，却具有不同的结构，与木质部和韧皮部不同，叶子的纹路交叉并成环。
2·Roads, railways, water and gas mains, sewage pipes and electricity cables all move things around. So do the blood vessels of animals and the sap-carrying xylem and phloem of plants.
他的观点是，在某种程度上二者均由运输物质的网络构成——公路，铁路，水路以及煤气管，污水管还有电缆线都在输送物质，动物血管和植物运输汁液的木质部、韧皮部也是如此。
3·And no significant differences were found in feeding behaviors among aphids on three plant parts once sustained ingestion started in the phloem.
一旦口针进入韧皮部持续吸食阶段，蚜虫在三个部位的取食行为没有太大的差异。
4·Mercury is carried there by the phloem and selectively deposited in it, rather than in the plants' more permanent parts.
汞通过韧皮部被转运到树皮中，有选择性地在其中沉积，而非在自己不易更新的部位沉积。
5·The rest of phloem also produced callus through dedifferentiation. In addition, there was callus from xylem.
残存的韧皮部也可以脱分化形成愈伤组织， 此外， 还存在愈伤组织源于木质部的情况。
1·The secondary phloem consisted of sieve cells and phloem parenchymas.
根的次生韧皮部则由筛胞和韧皮薄壁细胞组成。
2·Many gold particles were distributed over the phloem cells of the fine veins of the mature leaves, and were mainly located in the cell wall of the transfer cells.
成熟叶片小叶脉的韧皮细胞发现有大量的金颗粒标记，金颗粒主要标记在传递细胞的细胞壁中。
3·There are more developed phloem fiber and many albumin cells surround the phloem.
韧皮部外有发达的韧皮纤维和较多的蛋白细胞。
4·The aim of this research is to extract and utilize secretion of phloem of Tilia mongolica that use them to increase the zoophobous ability and phylactic power of non-resistant tree species.
研究椴树韧皮分泌物其目的则是提取、利用该物质用于非抗树种提高抗虫性和免疫力。
5·Rhubarb polysaccharide content is greater in phloem parenchyma than in xylem parenchyma. The mode of rhubarb polysaccharide production is gradual accumulation and storage.
与木薄壁细胞相比，韧皮薄壁细胞贮藏大黄多糖量相对较多，大黄多糖的贮藏和积累方式为逐渐累积。