eohippus

简明释义

英[ˌiːəʊˈhɪpəs]美[ˌioˈhɪpəs]

n. 始祖马；始行马（hyracotherium 的原称）

复 数 e o h i p p u s e s

英英释义

单词用法

同义词

反义词

例句

1.The four-toed Eohippus preceded the three-toed Miohippus, for example, but North American fossil evidence suggests a jerky, uneven transition between the two.

例如，四趾的始祖鸟先于三趾的始祖鸟出现，但北美的化石证据表明，这两种动物之间有一个急促而不均衡的转换过程。

2.The four-toed Eohippus preceded the three-toed Miohippus, for example, but North American fossil evidence suggests a jerky, uneven transition between the two.

例如，四趾的始祖鸟先于三趾的始祖鸟出现，但北美的化石证据表明，这两种动物之间有一个急促而不均衡的转换过程。

3.The eohippus was a small, dog-sized ancestor of modern horses.

始马是现代马的小型、犬大小的祖先。

4.Fossils of the eohippus have been found in North America and Europe.

在北美和欧洲发现了始马的化石。

5.The evolution from eohippus to the modern horse took millions of years.

从始马进化到现代马花费了数百万年。

6.Children learn about the eohippus in their science classes as an example of evolution.

孩子们在科学课上学习始马作为进化的一个例子。

7.The eohippus had four toes on each foot, unlike today's horses.

与今天的马不同，始马每只脚上有四个脚趾。

作文

The term eohippus refers to an ancient ancestor of the modern horse, known scientifically as Hyracotherium. This small, dog-sized creature roamed the Earth approximately 50 million years ago during the Eocene epoch. The eohippus, often referred to as the 'dawn horse', is a significant figure in the evolutionary history of horses because it showcases the early adaptations that would eventually lead to the development of the larger and more powerful equines we see today. The eohippus had several distinguishing features that set it apart from its modern descendants. Firstly, it had a much smaller stature, standing about 12 to 14 inches tall at the shoulder. Its limbs were shorter and more suited for navigating through dense forests rather than the open plains where modern horses thrive. The feet of the eohippus were also quite different; instead of a single hoof, it had four toes on its front feet and three on its back. This adaptation allowed it to have better traction on soft, muddy ground, which was common in its forested habitat. In terms of diet, the eohippus was primarily herbivorous, feeding on leaves, fruits, and soft vegetation. Its teeth were adapted for grinding plant material, a necessary trait for survival in an environment where tough grasses had not yet evolved. As the climate began to change and grasslands expanded, the evolutionary pressures on the eohippus led to significant changes over millions of years, resulting in the modern horse's ancestors developing longer legs, larger bodies, and specialized teeth for grazing. The study of the eohippus provides valuable insights into the processes of evolution and adaptation. It illustrates how species can change over time in response to their environment. Paleontologists have uncovered many fossils of the eohippus, allowing scientists to piece together a clearer picture of its life and environment. These findings contribute to our understanding of not only equine evolution but also the broader themes of biodiversity and ecological change throughout Earth's history. Moreover, the eohippus serves as a reminder of the interconnectedness of all living organisms. Just as the eohippus evolved into various horse species, all species are part of a complex web of life that has been shaped by environmental factors, competition, and natural selection. This knowledge underscores the importance of preserving biodiversity and protecting ecosystems that support a wide range of species. In conclusion, the eohippus is not just a fascinating relic of the past; it is a symbol of the dynamic processes that drive evolution. By studying this ancient horse, we gain a deeper appreciation for the rich tapestry of life on Earth and the remarkable journey of adaptation and survival that has occurred over millions of years. The legacy of the eohippus continues to inspire scientists and nature enthusiasts alike, reminding us of the importance of understanding our planet's history to inform our actions for the future.

“eohippus”一词指的是现代马的一个古老祖先，科学名称为Hyracotherium。这种小型、犬大小的生物在大约5000万年前的始新世时期漫游地球。eohippus通常被称为“黎明马”，它在马的进化历史中是一个重要的人物，因为它展示了最终导致我们今天所见的较大、更强壮的马匹发展的早期适应特征。 eohippus有几个与现代后代不同的显著特征。首先，它的体型要小得多，肩高大约12到14英寸。它的四肢较短，更适合在密林中穿行，而不是在现代马儿繁荣的开阔草原上。eohippus的脚也相当不同；它的前脚有四个脚趾，后脚有三个，而不是一个蹄子。这种适应使它能够在软泥地上获得更好的牵引力，这是它森林栖息地中常见的环境。 在饮食方面，eohippus主要是草食性的，吃树叶、水果和柔软的植物。它的牙齿适合研磨植物材料，这是在没有演化出坚韧草类的环境中生存的必要特征。随着气候开始变化，草原扩展，eohippus面临的进化压力导致数百万年内发生重大变化，最终导致现代马的祖先发展出更长的腿、更大的身体和专门用于放牧的牙齿。 对eohippus的研究提供了对进化和适应过程的宝贵见解。它说明了物种如何随时间变化以适应其环境。古生物学家发现了许多eohippus的化石，使科学家能够拼凑出更清晰的生活和环境图景。这些发现不仅有助于我们理解马的进化，还帮助我们理解地球历史上生物多样性和生态变化的广泛主题。 此外，eohippus提醒我们所有生物之间的相互联系。正如eohippus演变成各种马种一样，所有物种都是生命复杂网络的一部分，这一网络由环境因素、竞争和自然选择塑造。这一知识强调了保护生物多样性和保护支持各种物种的生态系统的重要性。 总之，eohippus不仅是过去迷人的遗迹；它是推动进化的动态过程的象征。通过研究这种古老的马，我们对地球上丰富的生命画卷及其数百万年来发生的适应与生存的非凡旅程有了更深刻的欣赏。eohippus的遗产继续激励科学家和自然爱好者，提醒我们理解我们星球历史的重要性，以指导我们未来的行动。