central layer of secondary

Objective To study secondary wall formation of helical tracheary elements in the stem of Cucurbita moschata.

目的观察南瓜(Cucurbita moschata)茎螺纹导管发育过程中次生壁的形成过程。

Lignin is a characteristic component of secondary walls.

木质素是次生壁成份的特征。

Fig.6 showing the secondary thickening between the gyres of the helix( arrow).

图6示次生壁物质在螺旋构架之间的填充(箭头)。

The inner layer( S3) of secondary wall is absent, the outer( S1+ S2) is wider than normal and the middle layer shows many radial discontinuities.

从径向切面或切向面看，在管胞次生壁上常具有明显的螺纹裂隙。

Fig.2 Showing lelf| handed helix of the isolated secondary wall and the join structure of vertical line( arrow).

图2示离体次生壁的形态，左手螺旋和垂直线联结结构(箭头)。

Ultra-structural Observation on Fiber Cell and Lignin Content Analysis of Secondary Wall during Cotton Fiber Development

棉花纤维发育过程超微结构观察和次生壁木质素含量的分析

Secondary xylem consists of pitted vessels, parenchyma fibers and rays.

次生木质部由孔纹导管、薄壁组织及射线所组成。

Influence of the Recontamination Resulted from the Biomembrane in Water Distribution Network

给水管网中管壁生物膜对水质二次污染的影响

It may develop by thickening of the secondary walls of parenchyma cells, or it may arise directly from meristematic cells.

它们可能由薄壁组织的细胞壁次生加厚而成，也可能直接来自于分生组织细胞。

IPE cells of passage one attached in 6 ～12 hours and became confluent monolayer cells in 5～7 days.

第 1次传代的IPE细胞 6～ 12h贴壁 ,5～ 7d生长融合为细胞单层。

Guo shifted his business to tofu -- this only led to failure as flies once again besieged him.

郭转了行，做起了豆腐生意——但他再次碰壁，因为苍蝇又纠缠起了他。

The Salts' Zoning Structure and Ore-forming Elements Distributing Pattern in Gobi Coverage;

戈壁覆盖层次生盐的分带结构和成矿元素的分布规律

A Biomechanical Study of the Cervical Spine Underwent Extensive Corpectomy Decompression with Preserving the Posterior Wall of the Corpectomied Vertebral Body;

保留椎体后壁的颈椎椎体次全切除减压术的生物力学研究

Research on the Corresponding Relation between Secondary Ground Pressure Acting on Shaft and Water Table and Rupture Mechanism of Shaft Lining

立井次生地压与地下水位对应关系及井壁破裂机理研究

Besides from the above-mentioned typical characters of hypersensitive reaction, the host cells also produced defense structure in cell walls and secondary metabolic materials.

除了上述典型的过敏性坏死反应特徵以外，寄主细胞还产生了细胞壁防御结构和次生物质。

The Technology of Generating the Inner, Outer and Hanging Wall Surfaces in Housing CAD Systems

住宅CAD系统中内壁、外壁及垂壁面生成技术

A duty which should be carried out at least once in a lifetime, an event that is to be passed down to descendants with a vivid fresco.

那是教徒一生中至少要履行一次的责任，鲜活的壁画的也将代代相传。

The second snub settled his hash.

第二次碰壁使他不敢再找麻烦了。

The workers skirted the edge of the cliff on a geological survey.

工人们沿着崖壁作了一次地质勘察。