tunicate

简明释义

英[ˈtjuːnɪkət;-keɪt]美[ˈtjʊnɪket]

n. 被囊动物，尾索动物

adj. 具膜背的，具皮鳞的；属于被囊类亚门的

英英释义

单词用法

同义词

反义词

例句

1.Deriving cellulose from natural sources such as wood, tunicate (ocean-dwelling sea cucumbers) and certain kinds of bacteria, researchers prepare crystals of different sizes and strengths.

通过从天然来源，如木材，被囊动物(海参类)和某些种类的细菌中提取纤维素，研究人员可以制备不同尺寸和强度的晶体。

2.Deriving cellulose from natural sources such as wood, tunicate (ocean-dwelling sea cucumbers) and certain kinds of bacteria, researchers prepare crystals of different sizes and strengths.

通过从天然来源，如木材，被囊动物(海参类)和某些种类的细菌中提取纤维素，研究人员可以制备不同尺寸和强度的晶体。

3.Some species of tunicates 海鞘 are known to filter water effectively.

一些海鞘种类以有效过滤水而闻名。

4.Invertebrates like tunicates 海鞘 play a crucial role in marine ecosystems.

像海鞘这样的无脊椎动物在海洋生态系统中发挥着至关重要的作用。

5.The tunicate 海鞘 has a unique life cycle that includes both a larval and adult stage.

海鞘具有独特的生命周期，包括幼虫和成体阶段。

6.The marine biologist studied the behavior of the tunicate 海鞘 in its natural habitat.

这位海洋生物学家研究了海鞘在其自然栖息地中的行为。

7.Researchers found that the tunicate 海鞘 can regenerate lost body parts.

研究人员发现海鞘能够再生失去的身体部分。

作文

Tunicates, also known as sea squirts, are fascinating marine animals that belong to the phylum Chordata. They are unique in their structure and behavior, making them a subject of interest for both scientists and casual observers alike. Tunicates can be found in various marine environments, from shallow coastal waters to the deep sea. One of the most intriguing aspects of tunicates is their life cycle, which includes both a free-swimming larval stage and a sessile adult stage. In their larval form, they exhibit characteristics that are similar to those of vertebrates, such as a notochord and a dorsal nerve cord. However, as they mature into adults, they undergo significant transformations, losing many of these features. This metamorphosis is a striking example of how diverse life forms can be within a single group.The body of a tunicate is covered by a tough outer covering called a tunic, from which they derive their name. This tunic is made of a cellulose-like substance, providing protection and support. Inside, tunicates possess a simple body structure with a siphon system that allows them to filter feed on plankton and other small particles suspended in the water. They draw water in through one siphon, filter it for food, and expel it through another siphon. This feeding mechanism is highly efficient, allowing tunicates to thrive in nutrient-rich environments.Tunicates play an essential role in their ecosystems. By filtering water, they help maintain water quality and clarity, benefiting other marine organisms. Additionally, they serve as a food source for various predators, including fish and sea stars. Some species of tunicates even have symbiotic relationships with microorganisms, which can enhance their feeding efficiency and contribute to the overall health of the marine ecosystem.Despite their ecological importance, tunicates face threats from environmental changes, including pollution and climate change. These factors can disrupt their habitats and affect their populations. Researchers are increasingly focusing on studying tunicates to understand their responses to changing conditions and to develop conservation strategies.In conclusion, tunicates are remarkable creatures that exemplify the diversity of life in our oceans. Their unique adaptations, ecological roles, and interesting life cycles make them worthy of study and appreciation. As we continue to explore and learn about the underwater world, it is crucial to recognize the significance of tunicates and the need to protect their habitats. By doing so, we ensure the health of marine ecosystems and the continuation of these extraordinary animals. In summary, the term tunicate refers to these intriguing marine animals that, despite their simplicity, contribute significantly to the biodiversity and functionality of oceanic ecosystems. Understanding and preserving them is vital for maintaining the balance of marine life.

海鞘，也被称为海绵，是属于脊索动物门的一种迷人的海洋动物。它们在结构和行为上都很独特，使其成为科学家和普通观察者都感兴趣的对象。海鞘可以在各种海洋环境中找到，从浅海沿岸水域到深海。海鞘最吸引人的一个方面是它们的生命周期，包括一个自由游动的幼体阶段和一个固定的成年阶段。在幼体形态中，它们表现出与脊椎动物相似的特征，如脊索和背神经索。然而，随着它们成熟为成年个体，它们经历了显著的转变，失去了许多这些特征。这种变态过程是一个引人注目的例子，展示了单一群体内生命形式的多样性。海鞘的身体被一种坚韧的外壳覆盖，这种外壳被称为鞘，正是因此得名。这个鞘由类似纤维素的物质构成，为海鞘提供保护和支持。在内部，海鞘具有简单的身体结构，配备有一个虹吸系统，使其能够过滤摄取浮游生物和悬浮在水中的其他小颗粒。它们通过一个虹吸将水吸入，过滤食物，然后通过另一个虹吸排出。这种进食机制非常高效，使海鞘能够在富含营养的环境中繁衍生息。海鞘在其生态系统中扮演着重要角色。通过过滤水，它们帮助维持水质和清澈度，使其他海洋生物受益。此外，它们还为各种捕食者提供食物来源，包括鱼类和海星。一些海鞘物种甚至与微生物形成共生关系，这可以增强它们的进食效率，并有助于海洋生态系统的整体健康。尽管海鞘在生态上重要，但它们面临着来自环境变化的威胁，包括污染和气候变化。这些因素可能会破坏它们的栖息地并影响它们的种群。研究人员越来越关注研究海鞘，以了解它们对变化条件的反应，并制定保护策略。总之，海鞘是非凡的生物，体现了我们海洋中生命的多样性。它们独特的适应性、生态角色和有趣的生命周期使它们值得研究和欣赏。随着我们继续探索和了解水下世界，认识到海鞘的重要性及其栖息地保护的必要性至关重要。通过这样做，我们确保海洋生态系统的健康以及这些非凡动物的延续。总之，术语海鞘指的是这些引人入胜的海洋动物，尽管它们简单，但对海洋生态系统的生物多样性和功能性贡献巨大。理解和保护它们对于维持海洋生命的平衡至关重要。