查询词典 midrib

Considering other differences that in leaves of Podocarpus there are three resin ducts under vascular bundle of midrib, mesophyll cells are differentiated into palisade tissue and sponge tissue; in leaves of Nageia, there is only one resin duct under vascular bundle in each vein and no obvious differentiation in mesophyll cells, palisade tissue can be found on both sides, and sclereids can also be found in mesophyll tissue.

结合罗汉松属植物主脉维管束下面有3个树脂道，叶肉分化为栅栏组织和海绵组织，而竹柏属植物每个叶脉维管束下面有1个树脂道，叶肉分化不明显，两面都有栅栏组织，叶肉中还具有大量石细胞等特征，认为罗汉松属和竹柏属在叶脉、叶形态和结构方面存在明显差异，2个属分开是比较合理的。

Any of various ferns of the widely distributed genus Polypodium, having simple or compound fronds, round sori arranged in one or more rows along the midrib, and creeping rootstocks.

水龙骨属植物一种分布广泛的水龙骨属植物，有简单的或复合的厥叶，沿中脑以一行或多行排列的圆形囊群，和爬行的根状茎

Any of various fern s of the widely distributed genus Polypodium,having simple or compound fronds,round sori arranged in one or more rows along the midrib,and creeping rootstocks.

水龙骨属植物一种分布广泛的水龙骨属植物，有简单的或复合的厥叶，沿中脑以一行或多行排列的圆形囊群，和爬行的根状茎

Leaves tufted; stipes 15-30 cm long, densely scaly at base, glabrous above; sterile lamina about 60 cm long and 20 cm wide, simply pinnate; pinnae numerous, alternate or subopposite, linear-lanceolate, the largest about 12 cm long and 1 cm wide, base cordate, apex acuminate, margin finely toothed; veins close, forking once or twice and forming areoles near the midrib; fertile lamina similar to sterile ones, but somewhat reduced, about 8 cm long and 0.4 cm wide, lower surface almost entirely covered with sporangia.

叶簇生；叶柄长15-30厘米，基部密被鳞片，向上近光滑；不育叶片长约60厘米，宽20厘米，一回羽状；羽片多数，互生或近对生，线状披针形，最长者长达12厘米，宽约1厘米，顶端长渐尖，基部心形，边缘有细密锯齿；叶脉1-2次分叉，近中脉形成网眼；能育叶与不育叶相似，但较小，长约8厘米，宽约0.4厘米，下部满布孢子囊。

Petiole 0.5-6.5 cm; leaf blade elliptic to ovate or broadly lanceolate, sometimes falcate, 5-20 X 2-8 cm, adaxially glabrous to sparsely pubescent, abaxially glabrous, base usually oblique, cuneate to narrowly cuneate, margin serrate to entire, rarely undulate or crenate, apex acuminate to acute, vermiform sclereids surrounding vascular bundles; lateral veins 4-14 on each side of midrib.

叶柄0.5-6.5厘米；有时，宽披针形的叶片椭圆形到卵形或，5-20 X 2-8厘米，正面无毛到疏生短柔毛，背面无毛，基础通常斜，侧脉4-14在中脉每边各。

The midrib-bundl es have be found with follow possible evolutionary trends: amphicribral bundle- almost-amphicriral bundle collateral bundle.

讨论 了中脉维管束类型可能的演化趋势：周韧维管束→近周韧维管束→下韧维管束。

According to the arra ngem ent of phloem and xylem, shape of xylem and the Arranging way of xylem rays, the midrib-bundles were divided into five forms :(1) amphicribral round bundle;(2 ) pinnate-ray amphicribral reniform bundle;(3) fan-ray amphicribral reniform b undle;(4) almost-amphicribral bundle;(5) collateral bundle.

根据中脉维管束结构特点：木质部与韧皮部的位置，木质部的形状，木射线排列的方式，可分为5个类型：（1）圆形周韧维管束；（2）羽线肾形周韧维管束；（3）扇线肾形周韧维管束；（4）近周韧维管束；（5）下韧维管束。

As the deficiency is getting more severe larger leaf areas become chlorotic, leaving only a narrow area along the midrib green.

随者缺钾渐次加重，大部分叶面褪绿，只留下沿中脉的一个狭窄部分保持着绿色。

Leaves basal and cauline; leaf sheaths glabrous or pilose; leaf blades linear, flat, 18–75 × 0.3–2(–4) cm, glabrous, glaucous or pilose, midrib prominent, margins scabrid or smooth, base tapering or broad and rounded, apex acuminate; ligule 0.5–4 mm, ciliolate.

叶基生和茎生叶鞘无毛或具柔毛；叶片线形，平， 18-75 * 0.3-2(-4)厘米，无毛，有白霜或具柔毛，突出的中脉，边缘粗糙或平滑，宽和圆形的基部渐狭或，先端渐尖；叶舌0.5-4毫米，具短缘毛。

Leaf blade glabrous, base of midrib sparsely pubescent abaxially; gland of calyx oblong or ovate-oblong, 1/4-1/2 decurrent to pedicel

无毛的叶片，背面的中脉基部疏生短柔毛；花萼长圆形或卵形长圆形的腺体，1/4-1/2 对花梗下延 8

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。