plesiosaurs

简明释义

英[pli:'sɪəsɔ:rz]美[pli'sɪrsɔrz]

n. 蛇颈龙；蛇颈龙类

英英释义

单词用法

同义词

反义词

例句

1.Ichthyosaurs, indeed, looked somewhat like dolphins, though plesiosaurs-with their long necks and diamond-shaped paddles-were unlike anything now alive.

实际上，看起来有些像海豚的鱼龙，和纵然有长颈和菱形状脚桨的蛇颈龙都不与如今存活的物种相似。

2.Ichthyosaurs, indeed, looked somewhat like dolphins, though plesiosaurs-with their long necks and diamond-shaped paddles-were unlike anything now alive.

实际上，看起来有些像海豚的鱼龙，和纵然有长颈和菱形状脚桨的蛇颈龙都不与如今存活的物种相似。

3.During the Jurassic period, many marine reptiles, including plesiosaurs, thrived in the oceans.

在侏罗纪时期，许多海洋爬行动物，包括蜥脚类，在海洋中繁盛。

4.Scientists have discovered fossils of plesiosaurs that provide insights into their anatomy and lifestyle.

科学家发现了蜥脚类的化石，这些化石为了解它们的解剖结构和生活方式提供了线索。

5.The long neck of plesiosaurs is often a topic of fascination among paleontologists.

长颈的蜥脚类常常是古生物学家感兴趣的话题。

6.Some documentaries depict plesiosaurs as the dinosaurs of the sea.

一些纪录片将蜥脚类描绘成海洋中的恐龙。

7.The extinction of plesiosaurs coincided with the mass extinction event that wiped out the dinosaurs.

在导致恐龙灭绝的大规模灭绝事件中，蜥脚类也同时灭绝。

作文

The world of prehistoric creatures is filled with fascinating and diverse species, one of which is the plesiosaurs. These marine reptiles roamed the oceans during the Mesozoic Era, approximately 200 million years ago to about 65 million years ago. The plesiosaurs are often characterized by their long necks, small heads, and large bodies, which made them unique among other marine reptiles of their time. Their distinct body shape has led to various theories about their hunting strategies and lifestyle. The anatomy of plesiosaurs is particularly intriguing. They had four flippers that allowed them to navigate through water gracefully. This adaptation was crucial for their survival in the aquatic environment. Unlike modern-day turtles, which have a more streamlined shell, plesiosaurs had a body that resembled that of a large seal or whale. Their long necks could reach out to catch fish and other prey, making them efficient hunters. Some scientists believe that plesiosaurs may have used their necks to ambush prey, similar to how some modern-day animals hunt. Interestingly, there are two main types of plesiosaurs: the long-necked variety and the short-necked variety. The long-necked plesiosaurs, such as Elasmosaurus, had necks that could be up to 15 feet long, while the short-necked types, like Plesiosaurus, had more robust bodies and shorter necks. This diversity in body shapes indicates that they occupied different ecological niches, allowing them to thrive in various marine environments. Despite their success, plesiosaurs faced challenges, especially during the mass extinction event at the end of the Cretaceous period. Scientists continue to study fossils to understand the factors that led to their decline. Some researchers speculate that changes in ocean temperatures, sea levels, and competition with other marine animals played significant roles in their extinction. Understanding the fate of plesiosaurs helps us learn more about the dynamics of ancient ecosystems and the impact of environmental changes on species survival. Today, plesiosaurs are often depicted in popular culture, including movies and documentaries, which can sometimes lead to misconceptions about their appearance and behavior. For instance, many portrayals exaggerate their size or inaccurately represent their movement. However, paleontologists work diligently to provide accurate representations based on fossil evidence. In conclusion, the study of plesiosaurs offers valuable insights into the history of life on Earth. These remarkable creatures were not just simple marine reptiles; they were complex beings that adapted to their surroundings in unique ways. By learning about plesiosaurs, we gain a deeper appreciation for the diversity of life that once existed and the evolutionary processes that shaped our planet. As we continue to uncover more fossils and data, the story of plesiosaurs will undoubtedly evolve, revealing even more about these captivating inhabitants of the ancient seas.

史前生物的世界充满了迷人而多样的物种，其中之一就是蛇颈龙。这些海洋爬行动物在中生代时期徘徊于海洋中，大约在2亿年前到6500万年前。蛇颈龙通常以其长颈、小头和大身体为特征，这使它们在当时其他海洋爬行动物中独树一帜。它们独特的身体形状引发了关于它们捕猎策略和生活方式的各种理论。 蛇颈龙的解剖结构特别引人入胜。它们有四个鳍肢，使它们能够优雅地在水中游动。这种适应性对它们在水生环境中的生存至关重要。与现代海龟不同，后者具有更流线型的外壳，蛇颈龙的身体更像大型海豹或鲸鱼。它们的长颈可以伸出捕捉鱼类和其他猎物，使它们成为高效的猎手。一些科学家认为，蛇颈龙可能利用其颈部伏击猎物，类似于一些现代动物的捕猎方式。 有趣的是，蛇颈龙主要分为两种类型：长颈型和短颈型。长颈型的蛇颈龙，如埃拉斯莫龙，颈部可以长达15英尺，而短颈型，如蛇颈龙，身体更加健壮，颈部较短。这种身体形状的多样性表明它们占据了不同的生态位，使它们能够在各种海洋环境中繁荣。 尽管取得了成功，蛇颈龙面临着挑战，尤其是在白垩纪末期的大灭绝事件中。科学家们继续研究化石，以了解导致它们衰退的因素。一些研究人员推测，海洋温度、海平面变化以及与其他海洋动物的竞争在它们的灭绝中起了重要作用。了解蛇颈龙的命运帮助我们更好地了解古代生态系统的动态以及环境变化对物种生存的影响。 今天，蛇颈龙常常在流行文化中被描绘，包括电影和纪录片，这有时会导致对它们外观和行为的误解。例如，许多描绘夸大了它们的体型或不准确地表现了它们的运动。然而，古生物学家努力根据化石证据提供准确的表现。 总之，对蛇颈龙的研究为我们提供了关于地球生命历史的宝贵见解。这些卓越的生物不仅仅是简单的海洋爬行动物；它们是复杂的生物，以独特的方式适应其环境。通过了解蛇颈龙，我们更深刻地欣赏曾经存在的生命的多样性以及塑造我们星球的进化过程。随着我们继续发现更多的化石和数据，蛇颈龙的故事无疑会不断演变，揭示出更多关于这些迷人的古代海洋居民的信息。