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- It has a well developed root cap with no root hairs developed from its epidermal cells. Stelar structure is tetrarch with pri- mary xylem elements in exarch development. Xylem and phloem strands are arranged in alternate. 漂浮根发生于茎节的中柱鞘细胞,它有发育良好的根冠,表皮细胞不分化为根毛,中柱初生木质部为四原型,发育方式为外始式,维管束中的木质和韧皮两部分相间排列,整个器官属内起源,可以说明这一漂浮器官是根而非叶。
- She twirled a strand of hair round her finger. 她把一绺头发卷绕在手指上。
- per phloem strand 每个韧皮部束
- phloem strand 韧皮束
- Haplostele A type of protostele having a solid strand of stele with the xylem on the inside encircled by phloem, pericycle, and endodermis. 单中柱：原生中柱的一种类型，是由韧皮部、中柱鞘和内皮层包围着内方的木质部构成的实心中柱。
- The Strand is one of London's busiest thoroughfares. 斯特兰德大街是伦敦最热闹的要道之一。
- There is a little idioblasts in the phloem. 叶脉维管束中韧皮部都具有异细胞存在。
- A single strand lives for up to seven years. 一根头发的寿命可长达7年。
- The strand party radio to request help. 受困的旅游团用无线电请求帮助。
- The filament strand alternates S and Z twist. 长丝纱的一段为S捻,一段为Z捻,两种捻向交替排列。
- A binder is necessary for strand integrity. 粘结剂对纤维的集束性能是必需的。
- A roving is made and then drawn to a fine strand. 先制成纤维条子,再将其牵伸成细纱线。
- Roots also differ from roots in the arrangement of xylem and phloem, having a solid central strand of vascular tissue rather than a hollow cylinder of conducting tissue. 根和茎不同，它无叶绿素，没有芽和叶，木质部和韧皮部的排列顺序也不同，其内部为实心的维管组织，而茎的内部为中空的圆柱形输导组织。
- The strand party radios for help . 这个受困旅游团用无线电发出求救信号。
- Am I walking into eternity along Sandymount strand? 莫非我正沿着沙丘走向永恒不成?
- She put aside a strand of hair from her face. 她把一缕头发从脸上掠开。
- The vascular cambium is located between the xylem and the phloem. 维管形成层位于木韧之间。
- She wore a single strand of pearls around her neck. 她脖子上戴着单串珍珠。
- We heard every strand of political opinion. 各派的政治观点我们都听到了。
- Prestressed steel strand extension machine? 预应力钢绞线拉伸设备?
