mammal

简明释义

英[ˈmæm(ə)l]美[ˈmæml]

n. 哺乳动物

复 数 m a m m a l s

英英释义

单词用法

同义词

反义词

例句

1.Bats is the only mammal that can fly.

蝙蝠是唯一能飞的哺乳动物。

2.A wolverine is a small, fierce mammal.

貂熊是一种小型，凶猛的哺乳动物。

3.Like when you walk outside on a hot day, you perspire, and your body cools itself down, a classic example of how a mammal regulates its own body temperature.

比如，当你在炎热的天气在户外行走，你会出汗，你的身体会自我降温，这是哺乳动物如何调节自身体温的典型例子。

4.The whale is a mammal.

鲸鱼是哺乳动物。

5.Here is a mammal.

这是一只哺乳动物。

6.The coastal hypothesis suggests an economy based on marine mammal hunting, saltwater fishing gathering, and the use of watercraft.

沿海假说提出了一种以捕猎海洋哺乳动物、收集捕捞咸水鱼和使用船只为基础的经济模式。

7.A dolphin is a highly intelligent mammal that lives in the ocean.

海豚是一种生活在海洋中的高度智能的哺乳动物。

8.The cheetah is the fastest land mammal in the world.

猎豹是世界上最快的陆地哺乳动物。

9.Bats are the only flying mammals.

蝙蝠是唯一能飞的哺乳动物。

10.Whales are the largest mammals on Earth.

鲸鱼是地球上最大的哺乳动物。

11.Humans are classified as mammals due to their warm-blooded nature.

人类因其温血特性而被归类为哺乳动物。

作文

Mammals are a diverse group of animals that share certain characteristics, making them unique in the animal kingdom. The term mammal (哺乳动物) refers to warm-blooded vertebrates that have hair or fur and typically give birth to live young. One of the most distinctive features of mammals (哺乳动物) is their ability to nurse their young with milk produced by mammary glands. This trait not only helps in the survival of the offspring but also fosters a strong bond between the mother and her young. There are approximately 6,400 species of mammals (哺乳动物) worldwide, ranging from tiny bumblebee bats to the massive blue whale. This vast diversity can be categorized into various groups, including monotremes, marsupials, and placentals. Monotremes, such as the platypus and echidna, are unique because they lay eggs instead of giving birth to live young. Marsupials, like kangaroos and koalas, carry and nurse their young in pouches. Placentals, which include humans, dogs, and elephants, give birth to more developed offspring after a longer gestation period. The adaptations of mammals (哺乳动物) to their environments are remarkable. For instance, polar bears have thick layers of fat and fur to keep them warm in icy habitats, while desert-dwelling fennec foxes have large ears that help dissipate heat. These adaptations enable mammals (哺乳动物) to thrive in a variety of ecosystems, from the arctic tundra to tropical rainforests. In addition to their physical adaptations, mammals (哺乳动物) exhibit complex behaviors and social structures. Many species are known for their intelligence and emotional depth. For example, elephants display empathy and mourning behaviors, while dolphins are known for their sophisticated communication skills. These social behaviors are often crucial for the survival of the species, as they help in finding food, protecting against predators, and raising young. The evolutionary history of mammals (哺乳动物) dates back over 200 million years. They evolved from reptilian ancestors during the Mesozoic era, a time when dinosaurs dominated the planet. The extinction of dinosaurs about 65 million years ago opened up ecological niches that allowed mammals (哺乳动物) to diversify and flourish. Today, they occupy almost every habitat on Earth, showcasing an incredible range of forms and lifestyles. However, despite their success, many species of mammals (哺乳动物) are currently facing threats due to human activities. Habitat destruction, climate change, and poaching are leading to declining populations and even extinction for some species. Conservation efforts are crucial to protect these animals and their habitats. Organizations around the world are working to preserve the natural environments of mammals (哺乳动物) and promote awareness about the importance of biodiversity. In conclusion, mammals (哺乳动物) are a fascinating and vital part of our planet's ecosystem. Their unique characteristics, diverse forms, and complex behaviors make them an essential subject of study in biology and conservation. Understanding and protecting mammals (哺乳动物) is not only important for their survival but also for the health of our planet as a whole.

哺乳动物是一类多样化的动物，它们共享某些特征，使它们在动物王国中独树一帜。术语mammal（哺乳动物）指的是温血脊椎动物，具有毛发或皮毛，通常会生育活幼崽。哺乳动物（哺乳动物）最显著的特点之一是能够用乳腺产生的奶水来哺育幼崽。这一特征不仅有助于幼崽的生存，还促进了母亲与幼崽之间的紧密联系。 全球约有6400种mammals（哺乳动物），从微小的蜜蜂蝙蝠到巨大的蓝鲸。这种广泛的多样性可以分为几大类，包括单孔类、有袋类和胎盘类。单孔类，如鸭嘴兽和针鼹，是独特的，因为它们下蛋而不是生育活幼崽。有袋类，如袋鼠和考拉，会在育儿袋中携带和哺育幼崽。胎盘类，包括人类、狗和大象，在较长的妊娠期后生育更发育成熟的幼崽。 哺乳动物（哺乳动物）对其环境的适应能力令人惊叹。例如，北极熊有厚厚的脂肪层和毛皮，以保持在冰冷栖息地中的温暖，而生活在沙漠的耳廓狐则有大耳朵，可以帮助散热。这些适应能力使得mammals（哺乳动物）能够在各种生态系统中繁衍生息，从北极苔原到热带雨林。 除了身体适应之外，mammals（哺乳动物）还表现出复杂的行为和社会结构。许多物种以其智慧和情感深度而闻名。例如，大象表现出同情心和哀悼行为，而海豚则以其复杂的沟通能力而著称。这些社会行为通常对物种的生存至关重要，因为它们有助于觅食、抵御捕食者和抚养幼崽。 哺乳动物（哺乳动物）的进化历史可以追溯到超过2亿年前。它们是在中生代时期由爬行动物祖先演化而来的，那时恐龙主宰着地球。大约6500万年前恐龙的灭绝打开了生态位，使得mammals（哺乳动物）得以多样化和繁荣。如今，它们几乎占据了地球上每一个栖息地，展示了惊人的形态和生活方式。 然而，尽管取得了成功，许多mammals（哺乳动物）物种目前正面临着由于人类活动造成的威胁。栖息地破坏、气候变化和偷猎导致一些物种数量下降，甚至灭绝。保护工作对于保护这些动物及其栖息地至关重要。世界各地的组织正在努力保护mammals（哺乳动物）的自然环境，并提高人们对生物多样性重要性的认识。 总之，mammals（哺乳动物）是我们星球生态系统中一个迷人且重要的部分。它们独特的特征、多样的形式和复杂的行为使它们成为生物学和保护研究的重要主题。理解和保护mammals（哺乳动物）不仅对它们的生存至关重要，而且对我们整个星球的健康也至关重要。