velamen

简明释义

英[vəˈleɪmen]美[vɪˈleɪmen]

n. [解剖] 膜，[解剖] 帆；[植] 根被

复 数 v e l a m i n a

英英释义

单词用法

同义词

反义词

例句

1.Some time ago, the Zheng prosperous velamen evaluated first session Zhejiang Province "ten big charitable stars".

不久前，郑昌根被评为首届浙江省“十大慈善之星”。

2.The contact resistance between contacts is composed of contraction resistance and velamen resistance.

电器触点间的接触电阻包括收缩电阻和薄膜电阻。

3.Objective To study Non-PVC officinal compounding velamen and glass bottle with transfuse of compatibility.

目的研究非PVC 多层共挤膜输液袋及玻璃瓶与大容量注射剂的相容性。

4.In the older parts of the roots, a modified spongy epidermis called velamen has the function to absorb humidity.

在比较根系比较老旧的部分，一种变性的海绵状表皮称为根被有吸收潮气的功能。

5.The authors studied the bright transform surface velamen of forging Al alloy LD10, chose the best technical dispensing and parameters.

对LD1 0锻件的光亮转化膜进行了研究，选出最佳工艺配方及参数。

6.In some orchids the velamen includes spongy and fibrous bodies near the passage cells.

在一些兰科植物里面，根被在通道细胞附近包含有海绵状的和纤维状的物体。

7.The traditional measuring method is that passing a large current through contacts so that velamen resistance is eliminated, then contact resistance is nothing but contraction resistance.

传统的检测方法是让触点接通一个较大的电流，以消除薄膜电阻，此时触点的接触电阻即为收缩电阻。

8.The traditional measuring method is that passing a large current through contacts so that velamen resistance is eliminated, then contact resistance is nothing but contraction resistance.

传统的检测方法是让触点接通一个较大的电流，以消除薄膜电阻，此时触点的接触电阻即为收缩电阻。

9.In orchids, the velamen serves as a sponge, absorbing water and nutrients from the air.

在兰花中，根被充当海绵，从空气中吸收水分和养分。

10.The plant's protective layer, known as velamen, helps it retain moisture in arid environments.

植物的保护层，被称为根被，帮助其在干旱环境中保持水分。

11.The velamen is crucial for epiphytic plants as it allows them to thrive without direct soil contact.

对于附生植物来说，根被至关重要，因为它使它们能够在没有直接土壤接触的情况下生存。

12.The velamen layer can vary in thickness depending on the species of the plant.

根据植物的种类，根被层的厚度可能会有所不同。

13.Researchers are studying how the velamen structure affects water retention in different species.

研究人员正在研究根被结构如何影响不同物种中的水分保持。

作文

In the world of botany, many terms describe the intricate structures and adaptations of plants. One such term is velamen, which refers to a specialized layer of spongy tissue found in the aerial roots of certain epiphytic orchids. This unique structure plays a crucial role in the plant's survival and adaptation to its environment. Understanding the function and significance of velamen can provide insights into the remarkable ways in which plants have evolved. The velamen serves several key functions: it aids in water absorption, protects the underlying tissues from desiccation, and provides a barrier against pathogens. The spongy nature of the velamen allows it to capture moisture from the air, particularly in humid environments where these orchids are commonly found. This ability to absorb water directly through their roots is essential for their survival, as they often grow in nutrient-poor substrates. Moreover, the velamen helps to insulate the plant against extreme temperature fluctuations, creating a more stable microenvironment for the delicate tissues beneath it. Another interesting aspect of velamen is its role in photosynthesis. While orchids typically rely on their leaves for this process, the velamen can also contribute to light absorption, especially in young or juvenile plants. This dual functionality highlights the adaptability of orchids, allowing them to thrive in various conditions. The presence of velamen is not limited to orchids; other plant species have developed similar structures that serve comparable functions. For instance, some bromeliads and certain types of ferns also exhibit a velamen-like layer that aids in moisture retention. Studying these adaptations can deepen our understanding of plant biology and ecology. In addition to its biological significance, the velamen also has cultural implications. Many orchid enthusiasts and horticulturists appreciate the beauty and complexity of these plants, often cultivating them in gardens or collections. The velamen adds to the overall aesthetic appeal of orchids, showcasing their unique adaptations. Furthermore, the study of velamen and related structures can inspire innovations in materials science and engineering. Researchers are exploring the properties of these natural structures to develop new materials that mimic their functionality, such as water-absorbing fabrics or protective coatings. In conclusion, the concept of velamen extends beyond mere botanical terminology; it encapsulates the intricate relationships between plants and their environments. By examining the role of velamen in orchids and other plants, we gain a greater appreciation for the diversity of life and the remarkable adaptations that have evolved over time. As we continue to explore the natural world, terms like velamen remind us of the complexity and beauty inherent in the plant kingdom.

在植物学的世界中，许多术语描述植物的复杂结构和适应性。其中一个术语是velamen，指的是某些附生兰花空气根中发现的一种特殊的海绵状组织层。这种独特的结构在植物的生存和适应环境中发挥着至关重要的作用。理解velamen的功能和重要性可以提供对植物如何进化的深刻见解。velamen有几个关键功能：它有助于水分吸收，保护下层组织免受干燥，并提供对病原体的屏障。velamen的海绵状特性使其能够捕捉空气中的水分，特别是在这些兰花常见的潮湿环境中。这种通过根部直接吸收水分的能力对于它们的生存至关重要，因为它们通常生长在营养贫瘠的基质中。此外，velamen还帮助隔离植物，抵御极端温度波动，为下面的细腻组织创造一个更稳定的微环境。velamen的另一个有趣方面是它在光合作用中的作用。尽管兰花通常依赖叶子进行这一过程，但velamen也可以在年轻或幼苗植物中贡献光吸收。这种双重功能突显了兰花的适应性，使它们能够在各种条件下生存。velamen的存在并不限于兰花；其他植物种类也发展出了类似的结构，起到相似的功能。例如，一些凤梨科植物和某些类型的蕨类植物也表现出一种类似velamen的层，有助于保持水分。研究这些适应性可以加深我们对植物生物学和生态学的理解。除了生物学意义外，velamen还有文化意义。许多兰花爱好者和园艺师欣赏这些植物的美丽和复杂性，常常在花园或收藏中培育它们。velamen增加了兰花的整体美感，展示了它们独特的适应性。此外，研究velamen及相关结构可以激发材料科学和工程领域的创新。研究人员正在探索这些自然结构的特性，以开发模仿其功能的新材料，例如吸水织物或保护涂层。总之，velamen的概念超越了单纯的植物术语；它概括了植物与其环境之间复杂的关系。通过考察velamen在兰花和其他植物中的作用，我们对生命的多样性和随时间演化的显著适应性有了更深的欣赏。随着我们继续探索自然世界，像velamen这样的术语提醒我们植物王国固有的复杂性和美丽。