midrib

简明释义

英[ˈmɪdˌrɪb]美[ˈmɪdˌrɪb]

n. 中脉

英英释义

单词用法

同义词

反义词

例句

1.It is found that the lower bainite consists of packets of bainite ferrite plates, each plate is composed of several bainite transformation units, bainite midrib exists generally.

GD钢中下贝氏体是由一束贝氏体铁素体片条组成的，而每一片条又是由多个贝氏体相变基元组成。下贝氏体中普遍存在中脊。

2.Culm sheath auricles falcate, long. Leaf blade abaxially minutely pubescent along one or both sides of midrib.

竿箨耳廓镰刀形，长。沿着中脉的两面的那个或的叶片背面稍具短柔毛。

3.Midrib Technology Co., Ltd. document.

中脉科技有限公司文件。

4.The scientists marked a lily bud with dots along each petal 's edge and "midrib" or central vein.

科学家们给每个百合的花瓣用点做了记号，主要的或中心纹理也做了记号。

5.The scientists marked a lily bud with dots along each petal's edge and "midrib" or central vein.

科学家们在百合花蕾的每片花瓣边缘和“中脉”或中央静脉上都标上了圆点。

6.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.

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。

7.The mesophyll is not differentiated into spongy and palisade tissues, but mesophyll near midrib in tip and middle parts of leaf is often lengthened to appear as palisade-liked tissue.

叶肉没有海绵组织和栅栏组织的分化，但叶尖部和叶中部中脉附近的叶肉细胞常伸长，类似栅栏组织细胞。

8.The mesophyll is not differentiated into spongy and palisade tissues, but mesophyll near midrib in tip and middle parts of leaf is often lengthened to appear as palisade-liked tissue.

叶肉没有海绵组织和栅栏组织的分化，但叶尖部和叶中部中脉附近的叶肉细胞常伸长，类似栅栏组织细胞。

9.During the dissection, we observed the midrib connecting the leaf veins.

在解剖过程中，我们观察到中脉连接着叶脉。

10.The leaf's structure is supported by the strong midrib, which is essential for its rigidity.

叶子的结构由坚固的中脉支撑，这对其刚性至关重要。

11.In some plants, the midrib is more pronounced, giving the leaf a unique appearance.

在某些植物中，中脉更加明显，使叶子具有独特的外观。

12.The midrib can be a distinguishing feature in identifying different species of plants.

在识别不同植物种类时，中脉可以是一个显著特征。

13.Botanists often study the midrib to understand the vascular system of plants.

植物学家常常研究中脉以了解植物的维管系统。

作文

The structure of a leaf is fascinating and plays a crucial role in its overall function. One important component of a leaf is the midrib, which is the central vein that runs down the length of the leaf. The midrib is essential for supporting the leaf and transporting nutrients and water from the stem to the leaf tissue. Without it, leaves would lack the necessary structure to maintain their shape and perform photosynthesis effectively.The midrib serves as a conduit for vascular tissues, including xylem and phloem. Xylem is responsible for transporting water and minerals from the roots, while phloem carries sugars produced during photosynthesis from the leaves to other parts of the plant. This dual function of the midrib is vital for the plant's health and growth.Additionally, the midrib contributes to the leaf's overall stability. It acts like a backbone, providing support to the leaf blade. This support is particularly important in larger leaves, which may be more susceptible to damage from wind or rain. The strength of the midrib allows the leaf to withstand various environmental conditions, ensuring that it remains intact and functional.Moreover, the midrib can also influence the leaf's shape and orientation. In some plants, the angle at which the leaf is positioned can optimize light absorption for photosynthesis. The midrib helps to maintain this angle by holding the leaf in place. This adaptability is crucial for plants living in diverse environments where light availability varies.In terms of evolution, the development of a well-defined midrib has allowed plants to thrive in a variety of habitats. Plants with a strong midrib can develop larger leaves, which can capture more sunlight and increase photosynthetic efficiency. This adaptation has enabled many species to occupy different ecological niches and compete effectively for resources.Furthermore, studying the midrib can provide insights into plant health. Changes in the structure or color of the midrib can indicate stress or disease within the plant. For instance, yellowing of the midrib might signal nutrient deficiencies, while wilting could suggest insufficient water supply. By monitoring the midrib, gardeners and botanists can assess the overall condition of the plant and take corrective measures if necessary.In conclusion, the midrib is a fundamental part of a leaf that plays multiple roles in plant health and functionality. It not only supports the leaf structurally but also facilitates the transport of essential nutrients and water. Understanding the importance of the midrib can enhance our appreciation of plant biology and contribute to better gardening practices. As we continue to explore the intricacies of plant structures, the midrib will undoubtedly remain a key focus of study, highlighting the complexity and beauty of nature's designs.

叶子的结构是迷人的，并在其整体功能中起着至关重要的作用。叶子的重要组成部分之一是中脉，它是沿着叶子长度延伸的中央脉络。中脉对于支撑叶子和运输营养物质及水分从茎到叶组织至关重要。没有它，叶子将缺乏维持其形状和有效进行光合作用所需的结构。中脉作为维管组织的导管，包括木质部和韧皮部。木质部负责将水和矿物质从根部运输，而韧皮部则将光合作用产生的糖从叶子运输到植物的其他部分。中脉的这种双重功能对植物的健康和生长至关重要。此外，中脉还对叶子的整体稳定性作出贡献。它就像一个脊柱，为叶片提供支撑。这种支撑在较大的叶子中尤为重要，因为它们可能更容易受到风或雨的损害。中脉的强度使叶子能够承受各种环境条件，确保其保持完整和功能正常。此外，中脉也会影响叶子的形状和方向。在某些植物中，叶子的位置角度可以优化光的吸收以进行光合作用。中脉通过保持叶子的位置来帮助维持这个角度。这种适应性对生活在光照可用性变化的不同环境中的植物至关重要。在进化方面，发达的中脉使植物能够在多种栖息地中繁荣生长。具有强大中脉的植物可以发展出更大的叶子，这样可以捕获更多的阳光并提高光合作用效率。这种适应性使许多物种能够占据不同的生态位，并有效地竞争资源。此外，研究中脉可以提供有关植物健康的见解。中脉结构或颜色的变化可能表明植物内部的压力或疾病。例如，中脉的发黄可能表示营养不足，而萎蔫可能表明水分供应不足。通过监测中脉，园丁和植物学家可以评估植物的整体状态，并在必要时采取纠正措施。总之，中脉是叶子的一个基本部分，在植物的健康和功能中发挥着多重作用。它不仅在结构上支撑叶子，还促进必需营养物质和水分的运输。理解中脉的重要性可以增强我们对植物生物学的欣赏，并有助于更好的园艺实践。随着我们继续探索植物结构的复杂性，中脉无疑将继续成为研究的重点，突显自然设计的复杂性和美丽。