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- three mature sieve element 三个成熟的筛管成分
- Mature or almost mature protophloem sieve element. 质膜已发生局部解体。
- mature sieve elements 成熟筛管成分
- Portion of a protophloem sieve element at the stage of maturation. 另外可见到电子致密的多膜复合体（箭）。
- The sieve element of the primary vascular system of the seedling of Nelumbo nucifera was sieve tube element. 莲幼苗初生维管系统中的筛分子为筛管分子。
- Vascular bundle have not cambium layer, vessel, and spiral tracheid as well.Only sieve element. 维管束无形成层，无导管，也不具有螺纹管胞，只有筛分子。
- A protophloem sieve element at an early stage of maturation,showing a nucleus at the onset of degeneration. 注意高尔基体发生某些变化，显示解体的迹象。
- For whitefly larvae,the H pattern indicates phloem ingestion but L pattern not,though still in sieve element. 在幼虫，H波代表吸食筛管液，而L波则表示在筛管细胞内的一种非吸食行为。
- A complex branched carbohydrate commonly associated with sieve areas of sieve elements. 胼胝质一种枝条繁杂的碳水化合物，与筛网原素的筛网区域相配合
- WU H,ZHENG X F.Ultrastructural on the sieve element in root protophleom of Arabidopsis thaliana[J].Acta Botanica Sinica,2003,45(3):322-330. [5]吴鸿;郑兴峰.;拟南芥原生韧皮部筛管分子的超微结构[J]
- Companion cell An elongated thinwalled cell cut off longitudinally from the same meristematic cell as the SIEVE ELEMENT with which it is closely associated. 伴胞：与筛管分子侧面相邻的一种细胞，和筛管间有密集胞间连丝，它与筛管是由分生组织的同一个母细胞不均等分裂发育而成。
- The development of the sieve element (SE) of meta-phloem is the same as the company cell (CC) in pedicel central vascular bundles of rice.First, the vacuolation of cytoplasm increases in SE and CC. 摘要水稻小穗柄中央维管束后生韧皮部筛管分子和伴胞的发育都经历了一个基本相同的过程，首先是细胞液泡化程度增加；
- As sieve tubes age, the callose layers become thicker, eventually blocking the SIEVE ELEMENT either seasonally or permanently.At wound and infection sites callose provides a physical barrier. 当筛管老化时，胼胝质层变厚并最终季候性或永久性的的阻塞筛孔，形成一个物理屏障，使筛管失去输导的功能。
- A complex branched carbohydratecommonly associated with sieve areas of sieve elements. 胼胝质一种枝条繁杂的碳水化合物,与筛网原素的筛网区域相配合。
- He trudge three hour in the snow to get back home. 他在雪中跋涉三个钟点才回到家。
- Our family reunions are always three ring circus. 我家合家团聚的场面总是热闹非凡。
- The train arrived on the dot of three o'clock. 那辆火车三点钟准时到达。
- Her family lives three li away from her school. 她家住在离学校有三里路的地方。
- We spied three figures in the distance. 我们望见远处有三个人影儿。
- The earthwork was cast up in three hours. 土方工程在三小时内就完成了。
