tetrapods

简明释义

英[ˈtetrəˌpɒdz]美[tetrəˈpɑːdz]

n. 四足动物（tetrapod 的复数）；四肢类

英英释义

单词用法

同义词

反义词

例句

1.Many primitive lineages went extinct as sharks and bony fish became masters of the waters and tetrapods, the four-legged animals that eventually evolved into dinosaurs and mammals, conquered the land.

许多原始生物灭绝，鲨鱼和硬骨鱼成为水域的主人，四足动物最终进化成了恐龙和哺乳动物，征服了陆地。

2.Many primitive lineages went extinct as sharks and bony fish became masters of the waters and tetrapods, the four-legged animals that eventually evolved into dinosaurs and mammals, conquered the land.

许多原始生物灭绝，鲨鱼和硬骨鱼成为水域的主人，四足动物最终进化成了恐龙和哺乳动物，征服了陆地。

3.Where children once scrambled over rocks to explore haunted caves, now they climb on cement tetrapods.

昔日孩童们攀爬岩石、探索闹鬼岩洞的地方，现如今已变成只能供他们爬楼梯的水泥四角物了。

4.Most modern amphibians are classified as 四足动物 due to their four limbs.

大多数现代两栖动物被归类为四足动物，因为它们有四肢。

5.The study of 四足动物 helps biologists understand limb development and evolutionary biology.

对四足动物的研究帮助生物学家理解肢体发育和进化生物学。

6.The evolution of 四足动物 allowed vertebrates to adapt to life on land.

四足动物的进化使脊椎动物能够适应陆地生活。

7.Birds and mammals are both examples of 四足动物 that have evolved unique adaptations for flight and warm-bloodedness.

鸟类和哺乳动物都是已经进化出独特适应性以适应飞行和温血性的四足动物例子。

8.Scientists study the fossils of early 四足动物 to understand how they transitioned from water to land.

科学家研究早期四足动物的化石，以了解它们如何从水中过渡到陆地。

作文

Tetrapods are a fascinating group of animals that have significantly shaped the evolutionary history of life on Earth. The term tetrapods (四足动物) refers to vertebrates that possess four limbs, which include amphibians, reptiles, birds, and mammals. This unique characteristic has allowed tetrapods (四足动物) to adapt to various environments, both terrestrial and aquatic. Understanding the evolution and diversity of tetrapods (四足动物) provides insight into how life transitioned from water to land, a milestone in biological history.The origins of tetrapods (四足动物) can be traced back to ancient fish that lived over 360 million years ago. These early fish began to develop adaptations that would eventually allow them to inhabit land. Features such as sturdy fins evolved into limbs capable of supporting weight on solid ground. This transition was not instantaneous; it involved numerous adaptations over millions of years. For instance, the famous lobe-finned fish, such as Tiktaalik, is considered a crucial link between aquatic life and the first tetrapods (四足动物).Once tetrapods (四足动物) emerged onto land, they diversified into various forms. Amphibians were among the first to conquer terrestrial habitats, possessing both aquatic and terrestrial adaptations. They typically have a life cycle that includes a larval stage in water, followed by a metamorphosis into an adult form that can live on land. This dual lifestyle highlights the evolutionary significance of tetrapods (四足动物) in bridging aquatic and terrestrial ecosystems.As time progressed, tetrapods (四足动物) continued to evolve, leading to the emergence of reptiles. Reptiles developed key adaptations, such as the amniotic egg, which allowed them to reproduce on land without the need for water. This innovation opened up new ecological niches and contributed to the success of tetrapods (四足动物) in diverse environments. Dinosaurs, a subgroup of reptiles, dominated the Earth for millions of years, showcasing the incredible adaptability of tetrapods (四足动物).With the extinction of the dinosaurs around 65 million years ago, mammals began to rise to prominence. Mammals exhibit unique traits, such as warm-bloodedness, fur, and advanced brain development. These features have enabled mammals, as a subgroup of tetrapods (四足动物), to thrive in various habitats, from the deepest oceans to the highest mountains. Today, mammals display remarkable diversity, with species ranging from tiny shrews to massive whales.Birds, another group of tetrapods (四足动物), evolved from theropod dinosaurs and are characterized by feathers and the ability to fly. Their adaptation to flight represents one of the most significant evolutionary advancements among tetrapods (四足动物). Birds occupy almost every habitat on Earth and play vital roles in ecosystems as pollinators, seed dispersers, and predators.In conclusion, tetrapods (四足动物) represent a critical chapter in the story of life on Earth. Their evolution from aquatic ancestors to the diverse array of land-dwelling and flying species we see today illustrates the power of adaptation and natural selection. Studying tetrapods (四足动物) not only helps us understand our own place in the tree of life but also emphasizes the interconnectedness of all living organisms. As we face challenges such as climate change and habitat loss, it is crucial to protect the diverse forms of tetrapods (四足动物) that continue to enrich our planet.

四足动物是一个迷人的动物群体，对地球生命的进化历史产生了重大影响。术语tetrapods（四足动物）指的是具有四肢的脊椎动物，包括两栖动物、爬行动物、鸟类和哺乳动物。这一独特特征使得tetrapods（四足动物）能够适应各种环境，包括陆地和水域。理解tetrapods（四足动物）的进化和多样性为我们提供了关于生命如何从水中转向陆地的重要见解，这是生物历史上的一个里程碑。tetrapods（四足动物）的起源可以追溯到大约3.6亿年前的古代鱼类。这些早期的鱼类开始发展出最终使它们能够在陆地生活的适应性特征。例如，著名的肢鳍鱼类，如Tiktaalik，被认为是水生生命与第一批tetrapods（四足动物）之间的重要联系。一旦tetrapods（四足动物）走上陆地，它们便开始多样化成各种形式。两栖动物是最早征服陆地栖息地的动物之一，具有水生和陆生的适应性。它们通常具有包括水中幼虫阶段的生命周期，随后经历变形成为可以在陆地生活的成年形式。这种双重生活方式突显了tetrapods（四足动物）在连接水生和陆生生态系统中的进化重要性。随着时间的推移，tetrapods（四足动物）继续进化，导致爬行动物的出现。爬行动物发展出关键的适应性，例如羊膜卵，这使它们能够在没有水的情况下在陆地上繁殖。这一创新开辟了新的生态位，并促进了tetrapods（四足动物）在多样环境中的成功。恐龙作为爬行动物的一个亚组，主宰了地球数百万年，展示了tetrapods（四足动物）令人难以置信的适应能力。大约6500万年前恐龙灭绝后，哺乳动物开始崛起。哺乳动物表现出独特的特征，如温血、毛发和高级脑部发育。这些特征使得哺乳动物作为tetrapods（四足动物）的一个亚组能够在从最深的海洋到最高的山脉等各种栖息地中繁荣。今天，哺乳动物展现出惊人的多样性，从微小的鼩鼱到巨大的鲸鱼，各种物种应有尽有。鸟类是另一个tetrapods（四足动物）群体，源自兽脚类恐龙，以羽毛和飞行能力为特征。它们对飞行的适应代表了tetrapods（四足动物）中最重要的进化进步之一。鸟类几乎占据了地球上的每一个栖息地，并在生态系统中扮演着重要角色，作为授粉者、种子传播者和捕食者。总之，tetrapods（四足动物）代表了地球生命故事中的一个关键章节。它们从水生祖先演变为我们今天所看到的多样化的陆生和飞行物种，展示了适应性和自然选择的力量。研究tetrapods（四足动物）不仅帮助我们理解自己在生命树中的位置，还强调了所有生物体之间的相互联系。在面临气候变化和栖息地丧失等挑战时，保护继续丰富我们星球的各种tetrapods（四足动物）是至关重要的。