xué xí yòng zhōng wén xiě dòng wù
学习用中文写动物
Learn to write animals in Chinese
Tiger, 老虎, lǎo hǔ,
Lion, 狮子, shī zi,
Wolf, 狼, láng,
Crocodile, 鳄鱼, è yú,
Elephant, 大象, dà xiàng,
Giraffe, 长颈鹿, cháng jǐng lù,
Hippo, 河马, hé mǎ,
Rhino, 犀牛, xī niú,
Peacock, 孔雀, kǒng què,
Monkey, 猴子, hóu zi,
Zebra, 斑马, bān mǎ,
Dolphin, 海豚, hǎi tún,
Penguin, 企鹅, qǐ é,
Polar bear, 北极熊, běi jí xióng,
Kangaroo, 袋鼠, dài shǔ,
Koala, 考拉, kǎo lā.
动物，或称后生动物（Metazoan），是一群多细胞真核生物，在生物分类学上构成名为动物界（学名：Animalia）的分类阶层。除了少数特例外，绝大多数动物会消耗有机物质，呼吸氧气，能够移动和有性生殖，其胚胎发育过程从空心细胞球（囊胚）开始。目前已有逾150万个现生动物物种被发表，其中昆虫是最大的类群，约有100万种。动物的全长从8.5×10−6公尺到33.6米不等。它们与其他生物和生活环境间有着复杂的相互作用，形成了繁杂的食物网。虽然人类属于动物，但在口语中，「动物」一词通常指人类以外的动物。针对动物的科学研究称为动物学。
多数现生的动物物种都属于两侧对称动物，这一演化支中的动物的身体结构在生物学上对称。两侧对称动物包括原口动物和后口动物，前者中有多类无脊椎动物，如节肢动物和软体动物；后者则涵盖了棘皮动物和脊索动物（包含脊椎动物）。前寒武纪末期的埃迪卡拉生物群中存在着早期动物的生命形式。在大约5.42亿年前开始的寒武纪生命大爆发中出现了许多海洋生物，就化石记录来看，这些海洋生物后来演变为许多现代动物所在的门。所有现存动物共有的6331组基因已经被确认，这些基因可能来自6.5亿年前的一个共同祖先。
分类史上，亚里士多德将动物分为“有血液的”和“无血液的”。 1758年，瑞典生物学家卡尔·林奈在其所著《自然系统》一书中创建了第一个动物分类系统。 1809年，让-巴蒂斯特·拉马克将其扩展到14个门级分类单元。 1874年，恩斯特·海克尔将动物界分为多细胞后生动物（动物的异名）和原生动物，单细胞生物不再被视为动物。在现代，动物的生物学分类依赖分子系统发生学等先进分析技术，能够有效地证明动物分类单元之间的演化关系。
在人类发展的过程中，其他动物（肉、卵和奶）一直是人类重要的食物来源，动物的皮和毛则被用来取暖。某些动物被驯化为家禽、家畜或宠物。除此之外，它们也是人类文化（如神话和宗教）的重要组成部分。
Animals, or metazoans (Metazoan), are a group of multicellular eukaryotes that form a taxonomic hierarchy called Animal Kingdom (scientific name: Animalia) in taxonomy. With a few exceptions, most animals consume organic matter, breathe oxygen, can move and reproduce sexually, and their embryonic development process starts with hollow cell balls (blastocysts). At present, more than 1.5 million living animal species have been published, of which insects are the largest group, with about 1 million species. The total length of the animal ranges from 8.5×10−6 meters to 33.6 meters. They have complex interactions with other organisms and living environment, forming a complicated food web. Although humans are animals, in colloquialism, the term “animal” usually refers to animals other than humans. Scientific research on animals is called zoology.
Most living animal species are bilaterally symmetrical animals, and the body structures of animals in this evolutionary branch are biologically symmetrical. Bilaterally symmetrical animals include protomouth animals and posterior animals. The former includes many types of invertebrates, such as arthropods and mollusks; the latter covers echinoderms and chordates (including vertebrates). Early animal life forms existed in the Ediacaran biota at the end of the Precambrian. In the Cambrian life explosion that began about 542 million years ago, many marine creatures appeared. From the fossil record, these marine creatures later evolved into the phylum where many modern animals are located. The 6331 sets of genes shared by all living animals have been confirmed, and these genes may come from a common ancestor 650 million years ago.
In the history of classification, Aristotle divided animals into “blooded” and “bloodless”. In 1758, the Swedish biologist Karl Linnaeus created the first animal classification system in his book “Systems of Nature”. In 1809, Jean-Baptiste Lamarck extended it to 14 door-level taxa. In 1874, Ernst Haeckel divided the animal kingdom into multicellular metazoa (a synonym for animals) and protozoa, and single-celled organisms are no longer considered animals. In modern times, the biological classification of animals relies on advanced analysis techniques such as molecular phylogeny, which can effectively prove the evolutionary relationship between animal taxa.
In the process of human development, other animals (meat, eggs, and milk) have always been important food sources for humans, and animal skins and fur have been used for heating. Certain animals are domesticated as poultry, livestock or pets. In addition, they are also an important part of human culture (such as mythology and religion).
