中脉

基本解释 (translations)

midrib  ·  midvein  ·  procubitus

与中脉相关的网络例句 [注：此内容来源于网络，仅供参考]

All characters that have been used to delimit more narrowly defined species in other treatments of Chinese Clethra exhibit a strongly continuous pattern of variation from west to east across the range of the species in China (i.e., leaf size and shape, the number of secondary veins on each side of the midvein, anther size and shape); they also exhibit geographically correlated or seemingly random patterns, but without correlated gaps in character states among any two or more characters (i.e., style pubescence, corolla abaxial surface, stamen exsertion).

用来界定更狭窄定义的中国的Clethra的其它种的全部特征，从中国种的分布区的西部到东部，展示了一种强烈的连续变异的样式（如，叶大小和形状，中脉每边次脉的数目，花药的大小和形状）；他们还展示出地理分布的相关或好像随机的样式，但是在任何2或更多特征状态间没有相关的特征间隔（如，花柱被短柔毛，花冠背面、雄蕊伸出）。叶大小与形状，在中脉，花药大小与形状的每边次脉的数量；也的他们展览好象地理上有相互关联或随机模式，但是没有有相互关联特征差距在任何2 特征或更多中说明即，花柱短柔毛，花冠背面，雄蕊exsertion。

Leaves simple, commonly opposite and decussate with one of a pair slightly smaller than other, rarely verticillate or alternate by abortion of one of a pair, usually 1-4(or 5) secondary veins on each side of midvein, originating at or near base and anastomosing apically, tertiary veins numerous, parallel, and connecting secondary veins and midvein but in Memecylon secondary veins pinnate and tertiary veins reticulate.

托叶无。单叶，通常对生和交互对生的具其中一片较小的叶，很少轮生的或由于一对中一枚败育而互生，通常次脉在中脉两边各1-4(或5)，发生在基部或近基部，在顶部网结，支脉多数，平等，与次脉和中脉相连但在 Memecylon中，次脉羽状和支脉网状。

Leaves opposite; petiole 4-7 mm; leaf blade elliptic to obovate, 3-8 × 1-4 cm, leathery, pubescent when young but glabrescent and shiny with age, abaxially gray tomentose, secondary veins 1 on each side of midvein, originating near leaf blade base, and meeting at apex, tertiary veins 4-6 on each side of midvein and connecting midvein to secondary veins, reticulate veins obvious, intramarginal veins 3-4 mm from margin, base broadly cuneate, apex rounded to obtuse and often slightly emarginate or sometimes slightly apiculate.

叶对生 叶柄4-7毫米；叶片椭圆形到倒卵形， 3-8 * 1-4 厘米，革质，幼时具短柔毛但老时脱落无毛和发亮的，背面灰色被绒毛，次脉在中脉两边各1，近叶片基部发出，在先端会集，第三脉在中脉两边各4-6和连结中脉和次脉，网脉明显，近边缘内脉距边缘3-4毫米，基部宽楔形，先端圆形到钝和通常稍微凹或有时稍具细尖。

Based on thermodynamics and thermo-acoustics, the effect of the pulse tube structure was analyzed. It was found that the cross sectional area of the pulse tube influence greatly the working fluid pressure and temperature distributions.

结合热力学和热声学两方面的理论，对脉管制冷机中脉管的结构进行了分析，发现脉管的截面积与其内工质压力、温度分布匹配与否，对脉管制冷机的性能有很大影响。

Petiole 1.5-2 cm, glabrescent or sparsely villous to densely pubescent or tomentose; leaf blade ovate, ovate-oblong, or obovate-oblong, 8-15 × 4-5 cm, abaxially sparsely to densely villous along midvein and lateral veins or densely pubescent and tomentose, adaxially sparsely villous or glabrescent, base unequally cordate, margin irregularly and doubly setiform serrate, apex acuminate or caudate-acuminate; lateral veins 15-20 on each side of midvein.

叶柄1.5-2厘米，后脱落或去密被短柔毛的疏生长柔毛或者；叶片卵形，卵状长圆形，或倒卵形长圆形， 8-15 * 4-5 厘米，背面稀疏到或者密被短柔毛和被绒毛密被长柔毛沿中脉和侧脉，侧脉15-20在中脉两边各。

Leaves opposite or rarely alternate, subequal in size; stipules lanceolate, 7-10 mm; petiole 1.5-6(-10) cm, densely pubescent; leaf blade dark green or black when dry, oblate to 5-angled or oblate to orbicular-ovate, often ovate in upper stems, 8-12(-18)× 7-14(-22) cm, papery, secondary veins 2 pairs along midvein, abaxial surface densely pubescent along veins and veinlets, adaxial surface roughish, densely strigose, base truncate, subcordate, or broadly cuneate, margin coarsely 8-12-dentate, teeth gradually larger distally, often biserrate apically, apex 3-cusped or lobed, tip serrulate. Glomerules on axillary spikelike flowering branches, male branches often branched, 8-17 cm; female spikes distal, unbranched or branched, 5.5-24 cm.

叶对生或很少互生，大小近等；托叶披针形，7-10毫米；叶柄1.5-6(-10)厘米，密被短柔毛；叶片深绿色或黑色的干燥时，扁球形到具5个角或扁球形的到圆形卵形的，通常在上面茎内卵形的， 8-12(-18)* 7-14(-22)厘米，纸质，次脉2 对沿中脉，背面密被短柔毛的沿脉和细脉，正面微糙，密被糙伏毛，基部截形，近心形，或宽楔形，团伞花序在腋生的穗状的花枝，雄性分枝通常分枝，8-17厘米的；雌性穗状花序上部，不分枝或分枝，-24 厘米。

They all have the typical structure of leaf of C4 plant, but out of the ordinary is that the structure of the midrib is alike the parallel veins and there is a layer of fiber cells between the phloem and the bundle-sheath of vein in the midrib and big parallel veins while the outer wall of the bulliform cells is less cuticularized.

摘 要：以7个杂交狗牙根品种的叶片进行解剖研究，结果表明，各品种均具禾本科 C4植物叶片典型结构，其独特处是：中脉结构与平行脉相似；中脉维管束、平行脉大维管束的维管束鞘内侧韧皮部外有一层纤维细胞；泡状细胞外壁很少角化。

Spikelets oblong to gaping, shining, laterally compressed, florets 2–3(–5), disarticulating below each floret; rachilla pilose, extended beyond uppermost floret; glumes lanceolate to oblong, subequal,± equaling spikelet, membranous, shining, keeled, lower glume 1-veined, upper glume 1–3-veined; floret callus small, pubescent to conspicuously bearded; lemmas lanceolate to oblong, hyaline to shiny cartilaginous, back rounded, finely 4-veined (5th midvein extended into awn), glabrous, awned from near base or in lower half, apex membranous, broad, 4-toothed or denticulately truncate; awn straight or weakly geniculate, usually not exserted from spikelet; palea hyaline, subequal to lemma.

小穗长圆形为了张口，发亮，侧面压扁，小花2-3(-5)，在每小花下面脱节；小穗轴具柔毛，在最重要的小花以外延长；披针形的颖片到长圆形，近等长，多少等长，膜质，发亮，龙骨状，下部颖片1脉，上面颖片1-3－脉；小花结茧小，青春期对显著公然反对；外稃披针形的到长圆形，对发亮软骨透明，背面圆形，好4脉(中脉第5 延伸进芒)，从小穗直或者身体虚弱膝曲，通常不外露的芒；透明的内稃，近等长于外稃。

Petiole 0.8-1.2 cm, glabrous; leaf blade elliptic to oblong-elliptic, 7-12(-16)× 2.5-4.5(-5.5) cm, leathery, abaxially pale green, brown glandular punctate, hirtellous near base especially along midvein but glabrescent, and becoming yellowish brown when dry, adaxially dark green,± rugulose, and glabrous, midvein, secondary, and reticulate veins abaxially raised and adaxially impressed, secondary veins 8 or 9 on each side of midvein, base broadly cuneate to obtuse, margin bluntly denticulate, apex shortly acuminate to acuminate. Flowers subterminal, solitary, ca.

叶柄0.8-1.2厘米，无毛；叶片椭圆形到长圆形椭圆形， 7-12(-16)* 2.5-4.5(-5.5)厘米，革质，苍绿色，棕色腺体具点，具微糙硬毛的近基部特别是沿中脉但是后脱落，并且干燥时成为黄棕色，正面深绿色，多少微皱，并且无毛，中脉，次脉，和网脉背面突起和正面凹陷，次脉在中脉两边各8或9，花近顶生，单生，直径约4厘米，近无柄。

Leaves opposite , very rarely stipulate, petiolate, entire, leathery to papery, usually glabrous; secondary veins usually prominent, numerous to few, oblique to perpendicular to midvein; tertiary veins reticulate, with adaxial brownish transvenous resin canals and abaxial linear or intervenous translucent glands; petiole often with basal liguliform appendage.

叶对生 ，极少具托叶，具叶柄，全缘，革质到纸质，通常无毛；次脉通常突出，许多对很少，偏斜到与中脉垂直；第三脉网状，具正面带褐色的transvenous树脂道并且背面线形或脉间的半透明的腺体；叶柄通常具基生舌状的附属物。

与中脉相关的网络解释 [注：此内容来源于网络，仅供参考]

dulia;gurjun;keruing bukut：中脉(假)龙脑香木

角状(假)龙脑香木 keruing;gombang | 中脉(假)龙脑香木 dulia;gurjun;keruing bukut | 小肋(假)龙脑香木 keruing kipas;keruing benar

medial vein：中脉

media 中脉 | medial vein 中脉 | median 中位数

midrib：中脉

其基部直接着生在叶鞘顶端,无柄少数禾草及竹类的营养叶则可具叶柄(petiole)],叶片有近轴(上表面)与远轴(下表面)的两个平面,在未开展或干燥时可作席卷状,有1条明显的中脉(midrib)和若干条与之平行的纵长次脉(sècondary veins),

midrib：中脉; 主脉

midlife 中年期 | midrib 中脉; 主脉 | migration 迁移

midrib：指叶中脉

midrib 中脉 | midrib 指叶中脉 | midribvein 中脉

midvein; midrib：中脉

末回裂片ultimate segment | 中脉midvein; midrib | 叶脉vein

stripping out the midrib：剥除叶中脉

stripping operation 拆模作业 | stripping out the midrib 剥除叶中脉 | stripping pattern 漏模

central nervure：中脉

central nervous system 中枢神经系 | central nervure 中脉 | central spindle 中心纺锤体

externomedian nerve：外中脉

externo-lateral ray 外侧辐肋 | externomedian nerve 外中脉 | exteroceptive conditioned stimulus 外感受性条件刺激

premedia：前中脉

premed 医学院预科 | premedia 前中脉 | premedial 前中的