蛇的英文简介30字

蛇为脊索动物门、爬行纲下的一类动物。

Snake is a kind of animal in chordate phylum and reptile system.

体细长，分为头、躯干和尾三部分，无四肢或在低等蛇类横裂的泄殖孔两侧有爪状的后肢遗迹。

It has a slender body, which is divided into three parts: head, trunk and tail.

There are no limbs or claw like rear support vestiges on both sides of the transverse hiatus of lower humans.

周身被鳞；头部形状各异，鼻孔位于吻侧，但终生海栖的海蛇科种类则居于吻背。

The body is scaly; the head shape is different, the nostril is located on the snout side, but the life-long marine snake species live on the snout back.

眼球外有保护性的透明皮肤，瞳孔圆形、垂直椭圆形或水平椭圆形，无活动性眼睑，晶体几呈圆球形；舌细长分叉。

There is a protective transparent skin outside the eyeball. The pupil is round, vertical, oval or oval, and horizontal.

There is no active eyelid. The crystal body is almost spherical. The tongue is slender and bifurcated.

前颌骨（仅蟒科蛇类具齿）、上颌骨、腭骨、翼骨和齿骨上附生着齿尖后弯的牙齿，然而齿的大小、数目及其结构则随不同蛇种而异。

However, the age, number and structure of the teeth vary according to the species of snakes.

尾部明显地短于头体长。

The tail is significantly shorter than the length of the head.

扩展资料

大多数蛇类都进行地面生活，其特点是在蛇目范围内体形正常，较少特化，一般腹鳞较宽大，在地面上行动迅速。例如，生活于山区的游科的紫沙蛇、眼镜蛇科的丽纹蛇属、蝰科的蝮属和烙铁头属中的大部分种类。

生活于平原丘陵的眼镜蛇科的环蛇属、蝰科的蝰蛇、白唇竹叶青。生活于沙漠或戈壁地区的花条蛇。有许多蛇在山区、平原及丘陵都可遇到，如眼镜蛇科的眼镜蛇及眼镜王蛇、蝰科的蝮蛇等。它们多半是分布范围较广的蛇。地面生活的蛇也栖息居洞内，其中有许多种类都善于游泳或者善于攀援。

参考资料来源：百度百科-蛇

The snake is a long and thin animal that lives in grass or other dark places. 、A snake has no legs or feet, but it can move very fast on its stomach. Snakes usually have green, yellow or black skins, which make them difficult for their enemies to find them. Some kinds of snakes live in water. They can swim as freely as fish.蛇是一种又长又瘦的动物，生活在草丛里和阴暗的地方。蛇没有腿和脚，靠胃部飞快的移动前进。蛇常常有绿色，黄色和黑色的皮肤，使得敌人很难找到他们。有些蛇生活在水里，他们能像鱼一样飞速的游移。

Snake is a kind of animal whose body temperature changes with temperature, because the snake itself has no perfect body temperature regulation mechanism to produce and maintain a constant body temperature.

蛇是一种体温随气温而变的变温动物，因为蛇本身没有完善的体温调节机制来产生和维持恒定的体温。

Snakes are carnivorous animals. They eat many kinds of animals, from invertebrates to all kinds of vertebrates. It is distributed in all parts of the earth except the north and south poles.

蛇是肉食性动物，所吃的动物种类很多，从无脊椎动物到各类脊椎动物。分布于地球上除南北极以外的所有地方。

Snakes are a special group of organisms that have evolved over 130 million years and play an important role in maintaining ecological balance.

蛇是历经1.3亿年的漫长进化发展而成的一个特殊生物类群，对维护生态平衡有着重要作用。

扩展资料

蛇是爬行纲动物演化史中最迟出现的类群，最早的蛇化石出土于距今七千多万年的中生代白垩纪地层内。蛇和蜥蜴的亲缘关系密切，许多学者经过研究发现：较原始的细盲蛇科的蛇中，体鳞呈覆瓦状排列，腹鳞小而分化不明显；上颌骨、腭骨、翼骨等颅骨密接，方骨短，限制了蛇嘴的极度张开；下颌保留着冠状骨；有乌喙骨和腰带骨。

巨蜥科的分叉之舌，以及美洲鬣蜥科（Iguanidae）的椎骨结构和血红蛋白经蛋白酶水解所产生的肽类指纹图等，均与蛇相似。更有甚者的是蜥蜴目中不但具有四肢退化而呈蛇形的蛇蜥科、蚓蜥科的种类。

并且还能在不同类型的蜥蜴之间看到其肢体长度比例上逐渐缩短直至萎缩消失的过程。这些实例都无可争辩地证实了蛇是渊源于蜥蜴，并循着身体延长和丧失四肢演化而从蜥蜴主干上所分化出的一个分支。