关于犀牛的英语作文范文 Rhinoceroses
这是一篇介绍犀牛的英语作文范文，犀牛英文为Rhinoceroses，犀牛是很古老的动物，属于频危物种，我们要爱护它。


Rhinoceros, often abbreviated as rhino, is a group of five extant species of knee-less, odd-toed ungulates in the family Rhinocero tidae. Two of these species are native to Africa and three to southern Asia.

Members of the rhinoceros family are characterized by their large size (they are some of the largest remaining megafauna, with all of the species able to reach one tonne or more in weight); as well as by a herbivorous diet; a thick protective skin, 1.5–5 cm thick, formed from layers of collagen positioned in a lattice structure; relatively small brains for mammals this size (400–600 g); and a large horn. They generally eat leafy material, although their ability to ferment food in their hindgut allows them to subsist on more fibrous plant matter, if necessary. Unlike other perissodactyls, the two African species of rhinoceros lack teeth at the front of their mouths, relying instead on their powerful premolar and molar teeth to grind up plant food.[1]

Rhinoceros are killed by humans for their horns, which are bought and sold on the black market, and which are used by some cultures for ornamental or (pseudo-scientific) medicinal purposes. The horns are made of keratin, the same type of protein that makes up hair and fingernails.[2] Both African species and the Sumatran rhinoceros have two horns, while the Indian and Javan rhinoceros have a single horn.

The IUCN Red List identifies three of the species as critically endangered.

关于犀牛的英语作文范文 Rhinoceroses

通常缩写为犀牛，犀牛，是一组5个现存物种的膝盖少，朝天犀牛tidae在家庭中的奇趾有蹄类动物。这些物种是原产于非洲和南亚。

的犀牛家庭成员的特点是其大尺寸（他们是一些现存最大的巨型动物，所有的品种能达到1吨或以上的重量）;以及饮食的草食性的厚厚的保护皮肤， 1.5-5厘米厚，形成层的胶原蛋白定位在晶格结构;相对较小的哺乳动物大脑大小（400-600克）和大喇叭。他们一般吃叶菜类的材料，虽然他们的能力在他们的后肠发酵食品，使他们能够更多的植物纤维物质存在的，如果有必要。不像其他的perissodactyls，他们的嘴的前两个非洲品种的犀牛缺乏牙齿，而是依靠其强大的前臼齿和臼齿研磨植物性食物。[1]

犀牛被杀害人类对它们的角，在黑市上购买和出售，以及所使用的一些文化观赏或（伪科学）药用目的。角是由角蛋白，同一类型的蛋白质，使头发和指甲。[2]两个非洲种和苏门答腊犀牛有两只角，而印度和爪哇犀牛有一个角。

世界自然保护联盟红色名录列为极度濒危的物种确定了三个。