缺铁的特征是嫩叶的叶脉之间萎黄。
Iron deficiency is characterized by chlorosis between veins in young leaves.
递归手段重复子元素，如叶脉的排列。
Recursion means repetition in subelements, like the pattern of veins in a leaf.
反过来，这就意味着需要许多大型叶脉。
叶脉有两种：平行脉和网状脉。
叶脉把养料和水分分配给整张叶子。
杂草中危害通常仅限于叶脉间的条状区域。
On grasses, injury is usually confined to areas between the veins.
叶片都包括表皮、叶肉和叶脉，且为等面叶。
The leaf blade consists of epidermis, mesophyll and vein, which is iso-bilateral leaf.
叶子也千疮百孔了，好些地方只剩黄黄的网状叶脉。
The leave were full of holes and there were only yellow net-like nerves remaining in many places.
该理论成果对叶脉纤维的提取研究及生产实践具有重要意义。
The principle presented in this paper is of significance to leaf fiber extraction.
叶脉是一个弹性很强的分布性网络，这种原理可以应用到电网建设。
The leaf, then, is a resilient distribution network—one whose principles could be applied to, say, electricity grids.
整体设计以叶脉式动线自然的产生为设计的整体规划的主导构想。
The overall design of the leaf type line produced naturally as the leading idea of the overall planning and design.
斯派利耶夫提到了这把巨剑的造型，并且其造型和叶脉有些相似。
Splitleaf refers to the shape of the great blade, and its resemblance to the veins of a leaf.
因此叶脉——树叶的骨架决定了树叶是典型的枫叶形状还是尖刀似的柳叶形状。
So it's the veins — the skeleton of the leaf — which determine whether you will have a classic maple shape or a blade-like willow.
采下茶叶后，将其蒸青、干燥，然后深加工，去掉叶脉、梗和杂质。
When the leaves are harvested they are steamed, dried and then further processed to remove the veins, stems and impurities.
纵向拼合每个叶和褶皱，叶底面内折叠和主叶脉形成顶部的褶皱脊。
Flatten each leaf and fold lengthwise so that the underside of the leaf is folded inside and main leaf vein forms the top ridge of the fold.
这个谜团即将揭晓。这多亏了一项新的数学模式，从叶脉角度出发探讨这个问题。
The mystery of why leaves take such different shapes is closer to being solved thanks to a new mathematical model that looks at the problem from the perspective of leaf veins.
叶脉：叶片中的维管束结构。在叶片中，所有叶脉排列的方式称脉络。
Vein One of the vascular bundles in a leaf. The pattern in which the veins are arranged in a leaf is called the VENATION.
他们认为，树木将水分输送至叶片的整个过程中，具备的总叶脉直径应当是相同的。
The idea being that the tree needs the same total vein diameter from top to bottom to properly irrigate the leaves.
如果植物需要不停地吸收水分，这有利于特定叶脉的几何分布，最终塑造树叶形状。
If a plant requires lots of water all the time, it could favor certain geometrical arrangements of veins, which starts to suggest overall leaf shapes.
表皮细胞和保卫细胞的长轴方向与叶脉走向一致，垂周壁平直或波形；
Epidermis cells and long axis of guard cells tend towards the same direction of venation.
本品可预防和治疗因缺锰造成的嫩叶脉间及叶尖褪绿、叶片发黄等症状。
ECO-Mn may prevent and cure the symptom include delicate vein and leaf tine fade, foliage yellowing result in lack of Mn.
叶脉中心的轴线为主要脉络，沿此设置重要公共功能分区，并向四周扩展。
As main axis, there is a main veining where the most important public functions are set up and extend to the surrounding.
在测定的30份大田病株茎杆、叶柄、叶脉样品中，阳性样品率为100%。
The rate of positive samples was 100% by the ELISA among 30 stems, petioles and veins from naturally diseased cottons.
o叶脉构成植物结构，为植物抵御破坏，甚至传送化学信号，与动物神经类似。
They provide structural support, resist damage, transport nutrients and even help send chemical signals to the plant, similar to nerves in an animal.
因此，游览的人群类似于树叶脉络中的水分，在室内空间中被慢慢有序地疏导。
Therefore, people touring inside are just like water drops within venations of leaves, moving slowly and orderly within the interior space.
他们的研究方法是，向叶片内注射荧光染料，看叶脉网络是否能够将染料输送到各处受损部位。
They discovered this by injecting fluorescent dye into leaves to see if the vein network could distribute the dye to all parts of a leaf that had been damaged.
肋骨，叶脉：肋骨或肋骨状部分，例如叶子的中脉或昆虫翼的较厚的前部线或边。
A rib or a riblike part, such as the midrib of a leaf or a thickened anterior vein or margin of an insect's wing.
发生在宁夏甜菜上的一种病毒病的病株叶丛主要表现为黄化、焦桔和叶脉黄化坏死。
A virus disease of sugar beet occurred in Ningxia showing symptoms of yellows, parch blight and necrotic yellow vein of foliage leaves.
发生在宁夏甜菜上的一种病毒病的病株叶丛主要表现为黄化、焦桔和叶脉黄化坏死。
A virus disease of sugar beet occurred in Ningxia showing symptoms of yellows, parch blight and necrotic yellow vein of foliage leaves.
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