sessile

简明释义

英[ˈsesaɪl]美[ˈsesɪl;ˈsesaɪl]

adj. （生物体，如藤壶）固着的；（植物或动物结构）无柄的

英英释义

单词用法

同义词

反义词

例句

1.Control group 20 patients (28 foci) with the sessile list polyps were treated by using hot probe.

对照组广基扁平息肉息者20例，28枚息肉，行内镜下热凝电极治疗。

2.Objective to resect colorectal flat sessile polyps by endoscopic polypectomy safely and effectively.

目的探讨安全有效地在内镜下摘除结、直肠扁平无蒂大息肉。

3.Flowers 5-merous, sepals broadly sessile, slightly connate basally, oblong, acute, to 2.5 mm, petals basally slightly connate, spreading, white, anthers dark red.

花5瓣，萼片宽，无柄，基部稍合生，长圆形，急尖，2.5毫米长，花瓣基部稍合生，平展，花瓣白色，花药深红色。

4.Flowers in sessile umbels, with or without leaves at base.

花生于无梗伞形花序，有或没有叶在基部。

5.It's not a bad smell, just not what I expected ants to smell like. But that's how you know it's sessile.

这个气味并不难闻，只是不像我所预期的蚂蚁的味道。

6.Leaves sessile or shortly petiolate, petiole to 5 mm; perianth tube not pubescent inside.

叶无柄或具短叶柄，对5毫米的叶柄；不青春期的花被筒在里面。

7.The barnacles are classified as sessile organisms, meaning they remain fixed in one place throughout their adult life.

藤壶被归类为定栖生物，这意味着它们在成年生活中始终固定在一个地方。

8.Many plants, such as mosses, are sessile, growing directly from the substrate without a stem.

许多植物，如苔藓，是定栖的，直接从基质上生长而没有茎。

9.The sessile nature of certain marine animals allows them to conserve energy by not moving around.

某些海洋动物的定栖特性使它们通过不四处移动来节省能量。

10.In ecology, sessile species play a crucial role in forming the structure of their habitats.

在生态学中，定栖物种在形成其栖息地的结构中发挥着关键作用。

11.Coral reefs are primarily composed of sessile corals that build their structures over time.

珊瑚礁主要由定栖珊瑚组成，这些珊瑚随时间推移构建起其结构。

作文

In the vast world of biology, one can encounter a myriad of fascinating organisms, each with unique characteristics and adaptations. Among these, the term sessile refers to organisms that are fixed in one place and do not move about freely. This characteristic is particularly significant in the study of plants and certain marine animals. For instance, many species of corals and barnacles are considered sessile, as they attach themselves permanently to rocks or other surfaces in their environment. Understanding the concept of sessile organisms helps us appreciate the complexities of ecosystems. These organisms often play crucial roles in their habitats. For example, sessile corals build extensive reefs that provide shelter and food for numerous marine species. The health of these coral reefs is vital for maintaining biodiversity in ocean environments. Similarly, sessile plants, such as mosses and lichens, contribute to soil formation and stabilization, which are essential for the survival of other plant species. The adaptations that allow organisms to be sessile are diverse and fascinating. Many sessile creatures have evolved specialized structures to anchor themselves securely to their surroundings. For instance, barnacles have hard shells that protect them from predators while firmly attaching to rocks or ships. On the other hand, plants like seaweeds possess holdfasts that enable them to remain anchored in turbulent waters. These adaptations not only ensure their survival but also enhance their ability to capture nutrients and sunlight, which are critical for their growth. Furthermore, the behavior and reproductive strategies of sessile organisms are often quite different from their mobile counterparts. Since they cannot move to find mates, many sessile species have developed unique methods of reproduction. For example, some corals reproduce by releasing eggs and sperm into the water, where fertilization occurs externally. Others may rely on budding or fragmentation, allowing new individuals to grow from a part of the parent organism. These reproductive strategies highlight the resilience and adaptability of sessile life forms in various environments. Despite their immobility, sessile organisms can respond to environmental changes. For instance, many plants can adjust their growth patterns based on the availability of sunlight or water. Similarly, sessile marine organisms may alter their feeding behaviors in response to changing currents or nutrient levels in the water. This ability to adapt is crucial for their survival in dynamic ecosystems. In conclusion, the term sessile encompasses a wide range of organisms that are fixed in one location, yet they exhibit remarkable adaptations and play vital roles in their ecosystems. From coral reefs to terrestrial plants, sessile organisms contribute significantly to the balance of nature. By studying these fascinating life forms, we gain insights into the intricate relationships within ecosystems and the importance of preserving biodiversity. Understanding the concept of sessile not only enhances our appreciation for the natural world but also highlights the need for conservation efforts to protect these essential organisms and their habitats.

在生物学的广阔世界中，人们可以遇到无数迷人的生物，每种生物都有独特的特征和适应能力。在这些生物中，术语sessile指的是固定在一个地方且不自由移动的生物。这一特征在植物和某些海洋动物的研究中尤为重要。例如，许多珊瑚和藤壶物种被认为是sessile的，因为它们永久地附着在岩石或其他表面上。 理解sessile生物的概念有助于我们欣赏生态系统的复杂性。这些生物通常在其栖息地中发挥着至关重要的作用。例如，sessile珊瑚构建了广泛的珊瑚礁，为众多海洋物种提供了庇护和食物。这些珊瑚礁的健康对维持海洋环境中的生物多样性至关重要。同样，sessile植物，如苔藓和地衣，有助于土壤形成和稳定，这对其他植物物种的生存至关重要。 使生物能够成为sessile的适应能力是多种多样且引人入胜的。许多sessile生物已经进化出特殊的结构，以便牢固地固定在其周围环境中。例如，藤壶具有坚硬的外壳，可以保护自己免受捕食者的攻击，同时牢牢附着在岩石或船只上。另一方面，像海藻这样的植物则拥有固定器，使它们能够在湍急的水域中保持固定。这些适应不仅确保了它们的生存，还增强了它们捕获营养和阳光的能力，而这些对于它们的生长至关重要。 此外，sessile生物的行为和繁殖策略往往与其活动的同类大相径庭。由于它们无法移动寻找配偶，许多sessile物种发展出了独特的繁殖方法。例如，一些珊瑚通过将卵子和精子释放到水中进行繁殖，受精发生在外部。其他物种可能依赖于芽生或断裂，允许新个体从母体的一部分生长出来。这些繁殖策略突显了sessile生物在各种环境中的韧性和适应能力。 尽管静止不动，sessile生物仍能对环境变化作出反应。例如，许多植物可以根据阳光或水的可用性调整其生长模式。同样，sessile海洋生物可能会根据水中的流动或营养水平的变化调整其觅食行为。这种适应能力对它们在动态生态系统中的生存至关重要。 总之，术语sessile涵盖了一系列固定在一个位置的生物，它们表现出显著的适应能力，并在其生态系统中发挥着重要作用。从珊瑚礁到陆生植物，sessile生物对自然的平衡贡献显著。通过研究这些迷人的生命形式，我们获得了对生态系统内复杂关系的深入了解，以及保护生物多样性的重要性。理解sessile的概念不仅增强了我们对自然界的欣赏，也突显了保护这些重要生物及其栖息地的必要性。