黄河现货交易市场:海豚的英文简介

给你个网址吧，有很多内容
http://www.animaltime.net/dolphins/dolphin_information.html

海豚 Delphinidae;dolphins 海豚属于哺乳纲、鲸目、齿鲸亚目，海豚科，通称海豚，共有近62种，分布于世界各大洋。体长1.2～4.2米，体重23～225千克。海豚一般嘴尖，上下颌各有约100颗尖细的牙齿，主要以小鱼、乌贼、虾、蟹为食。 海豚喜欢过“集体”生活，少则几头，多则几百头。海豚是一种本领超群、聪明伶俐的海中哺乳动物。经过训练，能打乒乓球、跳火圈等。除人以外，海豚的大脑是动物种最发达的。人的大脑占本人体重的百分之二点一，海豚的大脑占它体重的百分之一点七。海豚的大脑由完全隔开的两部分组成，当其中一部分工作时，另一部分充分休息，因此，可终生不眠。 海豚是靠回声定位来判断目标的远近、方向、位置、形状、甚至物体的性质。有人做试验，把海豚的眼睛蒙上，把水搅浑，它们也能迅速、准确的追到扔给它的食物。 海豚不但有惊人的听觉，还有高超的游泳和异乎寻常的潜水本领。据有人测验，海豚的潜水记录是300米深，而人不穿潜水衣，只能下潜20米。至于它的游泳速度，更是人类比不上的。 海豚的速度可达每小时40公里，相当于鱼雷快艇的中等速度。

翻译如下:
Porpoise Delphinidae; The dolphins porpoise belongs to the mammalia, the whale item, the toothed whales 亚目, the porpoise branch, is generally called the porpoise, the pooled nearly 62 kinds, distribute in world each big ocean. Body long 1.2 ~ 4.2 meters, body weight 23 ~ 225 kilograms. The porpoise common mouth point, above the lower jaw respectively has approximately 100 high-pitched and fine toeet, mainly take the small fish, the cuttlefish, the shrimp, the crab as the food. The porpoise likes " the collective " the life, are few then several heads, many pieces of several hundred heads. The porpoise is one kind of ability is outstanding, in the intelligent clever sea the mammal. Undergo the training, can play the ping pong, jump 火圈 and so on. Besides the person, porpoise's cerebrum is moves the species developed. Human's cerebrum accounts for personally body weight 2.1%, porpoise's cerebrum accounts for its body weight 1.7%. Porpoise's cerebrum by two parts which completely separates is composed, when one part of work, another part of full rests, therefore, but is life-long does not sleep. The porpoise is depends on 回声定位 judges the goal far and near, the direction, the position, the shape, even the object nature. Some people 做试验, hoodwink porpoise's eye, is muddy the atmospheric conditions just before a rain, they also can be rapid accurately, pursue to throw for its food. The porpoise not only has the astonishing sense of hearing, but also has the excellent swimming and the unusual diving ability. According to some people examines, porpoise's diving recording is 300 meters depth, but the person does not put on dives 水衣, only can dive 20 meters. As for its swimming speed, is the humanity does not compare. Porpoise's speed may amount to each hour 40 kilometers, is equal to the torpedo speed boat 中等速度.

Dolphins are aquatic mammals related to whales and porpoises. The name is from Ancient Greek δελφίς delphis meaning "with a womb", viz. "a 'fish' with a womb".

The word is used in a few different ways. It can mean:

Any member of the family Delphinidae (oceanic dolphins),
Any member of the families Delphinidae and Platanistoidea (oceanic and river dolphins),
Any member of the suborder Odontoceti (toothed whales; these include the above families and some others),
Used casually as a synonym for Bottlenose Dolphin, the most common and familiar species of dolphin.
In this article, the second definition is used.

Porpoises (suborder Odontoceti, family Phocoenidae) are thus not dolphins in our sense. Orcas and some related species belong to the Delphinidae family and therefore qualify as dolphins, even though they are called whales in common language.

There are almost 40 species of dolphin in 17 genera. They vary in size from 1.2 m (4 ft) and 40 kg (88 lb) (Maui's Dolphin), up to 9.5 m (30 ft) and 10 tonnes (the Orca). Most species weigh about 50 to 200 kg (110 to 440 lb). They are found worldwide, mostly in the shallower seas of the continental shelves, and all are carnivores, mostly eating fish and squid.

The family Delphinidae is the largest in the Cetacea, and relatively recent: dolphins evolved about 10 million years ago, during the Miocene.

Dolphins
Dolphins are not fish, but warm-blooded animals. They live in groups, and speak to each other in their own language. In this way they are like other animals, such as bees and birds. But dolphins are very different from almost all land animals. Their brain (大脑) is nearly the same size as human brain, and they live a long time - twenty or thirty years.
Like some other animals, dolphins use sound to help them find their way around. They also make these sounds to talk to each other and help them find food. We now know they do not use their ears to get these sounds, but the lower part of the mouth, called the jaw (颌).

Clever dolphins
After a long period of studies，scientists are uncovering (揭开) surprising new findings (研究结果) about dolphins (海豚). They believe that dolphins do "talk" to each other， whistling "names" among themselves. They help one another when in trouble.Like bats， they use sound waves to "see". Because of these and many other findings， many scientists now place dolphins among the cleverest animals on earth.
Dolphins love mimic (模仿). If we swim on our backs， they follow. Once when a trainer blew a puff (一口) of cigarette smoke against the window of an observation tank (观察舱)， a young dolphin suddenly swam to its mother， nursed a moment， and spat out a cloud of milk against the glass.
It is even more surprising that dolphins are able to understand sign language. One kind of Herman's dolphins has mastered more than 50 sign words. And they can also mimic the sign of "speaking" to each other.
Dolphins help one another.When birthgiving takes place，females (雌性) gather to keep off sharks (鲨鱼). Later， when the swimming mother looks for food，they take care of the young dolphin， swimming in a circle.
Dolphins reach out to us in astonishing ways. What would the world be like without them？
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