只会品菜
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，海豚的大脑是动物中最发达的。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，海豚更是人类比不上的。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。在鲸类王国里，要数海豚家族——海豚科的种类最多了，全世界已知共有30多种。有的种类虽名叫“鲸”，如虎鲸、伪虎鲸，其实也是海豚家族中的成员。海豚是一类智力发达、非常聪明的动物，它们既不像森林中胆小的动物那样见人就逃，也不像深山老林中的猛兽那样遇人就张牙舞爪，海豚总是表现出十分温顺可亲的样子与人接近，比起狗和马来，它们对待人类有时甚至更为友好。海豚救落水的人的故事，我们听了很多很多，海豚与人玩耍、嬉戏的报道也常有所闻，有的故事甚至成为轰动一时的新闻。经过学习训练的海豚，甚至能模仿某些人的话音。70年代，美国的三位科学家，让两头海豚学会了25个单词。新近，太平洋海洋基金会的欧文斯博士等4位科学家，对两头海豚进行训练，花了3年时间，教会它们700个英文词汇。不过有些科学家认为，不能把动物的“语言”或“方言”描绘得太离奇。不过海豚确实具有与众不同的智力。它的大脑体积、质量也是动物界中数一数二的。目前，科学家对动物的智力有两种不同的见解：一种认为黑猩猩是一切动物中最进化、最能干的；另一种却认为海豚的智力和学习能力与猿差不多，甚至还要高一些。因而有人称海豚为“海中智臾”。 The dolphin is a skill outstanding, the smart sea mammals. After training, can play table tennis, jump ring of fire, etc. Besides, beside those dolphins brain is the most developed in animals. The human brain accounted for my weight 2.1%, dolphins brain accounted for it one point seven percent of their weight. Dolphins brain by completely separated two parts, when one part is working, the other part of the rest adequately, therefore, may lifelong sleepless.Dolphins are on echolocation to judge target distance, direction, position and shape, even objects of nature. Someone do test, the dolphin blindfold, muddy water, they also can rapid, accurate back to throw its food. Dolphins have not only astonishing hearing, and superb swimming and diving unusually skill. According to some tests, dolphin diving record is 300 meters deep, and people don't wear a diving suits, can descend 20 meters. As regards the swimming speed,Dolphins is human't match. Dolphins speed per hour 40 kilometers, equivalent to torpedo boats of medium speed. In cetaceans kingdom to several dolphin family - the dolphin secco most species, the world known 30 many kinds. Some species though named "whales", such as the orcas, false killer whales, dolphins is actually in the family members.Dolphins is a kind of intelligence is developed, very smart animals, they do not like forest timid animal that see people fled, also do not like the beast that meet mountains will show your teeth, dolphins always behaved very docile amiable people close to, like the appearance than dogs and Malay, they treated humans sometimes even more investor-friendly.Dolphins save drowning person's story, we listened to many people, dolphins and play and playful report also often have to smell, some stories, even become a sensation of news. After the training of dolphins, even can imitate some people's voice. In the 1970s, the United States three scientists, let two dolphins learned 25 words. Recently, the Pacific Ocean foundation owens PHDS four scientists, training for two dolphins, spent three years, the church they 700 English vocabulary. But some scientists think, cannot animals "language" or "dialect" describe too extraordinary.But dolphins actually have distinctive intelligence. Its brain size, quality also is one of the best in the animal world. At present, the intelligence of animals, scientists have two kinds of different opinions: one is that chimpanzees are all animals most evolution, and the most efficient, Another one was believed that dolphins intelligence and ability to learn and apes almost, or even higher. Thus one called for "sea dolphin ciic Yu".
聰軎膥賳过
There is a sonar receiver in the dolphin's brain, and depending on this, they can accurately determine the location of the food. You must have heard the story of dolphins saving people. In fact, dolphins save people not because they are born with the spirit of self-denial, but because their companions are often injured, including themselves. When their companions are injured, they will arch it on the water to inhale oxygen, so they often mistake humans as injured partners, and do their best to arch the water, thus reproducing their touching story of saving people.
对照中文：海豚的大脑里有一块声呐接受器，就靠这个，它们可以准确的确定食物的位置。你一定听说过海豚救人的故事吧，其实海豚救人，不是因为它们天生有舍己救人的精神，而是它们的同伴经常受伤，包括它们自己也是。当同伴受伤时，它们就会把它拱上水面吸氧，所以它们就常常误把人类当成受伤的伙伴，竭尽全力地拱上水面，也就再现了它们救人的动人故事。
扩展资料：
海豚主要栖息于热带的温暖海域，但也有一些比如露脊海豚（Lissodelphis）更喜欢寒冷水域。通常生活在浅水或至少停留在海面附近。
豚泳是海豚科动物独有的游泳方式，整个身体以小角度跃离水面再以小角度入水，这是区别海豚和其他鲸类动物的方法之一（鼠海豚科和其他鲸类动物一般情况下都不会采用这种方式游泳）。
海豚游速迅捷，通常最快速度在每小时30-40km左右，个别种类的海豚时速可以超过55km/h，并能维持很长时间，是海洋中的长距离游泳冠军。
米拉妹妹12
1、Dolphins live in the ocean,but they are not fish.They are warm-blooded mammals and must have air to breathe.The babies are born alive and drink milk from the mother's body.It took millions of years for the dolphins to develop as it is today.
2、Dolphins live in groups,and speak to each other in their own language.That is a high sound and many singers love to learn this beautiful “song”.Their sound seems to have different functions,such as warning each other of danger or showing kindness to others. Dolphins also use sound to help them find their way around, and to help them find food. In this way they are like other animals,such as bees and birds.But dolphins are very different from almost all land animals. We now know they do not use their ears to receive their sounds,but the lower part of the mouth,called the jaw.Dolphins have bigger brain in proportion to their body size than humans have and they live a long life—at least 20 or 30 years.
3、Strangely,dolphins seem to like man,and for thousands of years there have been stories about the dolphin and its frindship with people.
4、there is a story about sailors in the 19th century.In a dangerous part of the sea off New Zealand,they learnt to look for a dolphin called Jack.From 1871 to 1903 Jack met every boat in the sea and showed it the way.Then in 1903 a passenger on a boat called The Penguin shot and wounded Jack.He recovered and for nine years more continued to guide all ships through the area except for The Penguin.
5、Today,some people continue to kill dolphins even the mother and babies，but many countries of the world now protect them and in these places it is against the law to kill them.Dolphins are very gentle and playful with each other and with humans,they are our lovely friends,let's own the same beautiful world with them forever!
麦兜爱李公主
Dolphin (aquatic mammal), fast-swimming mammal belonging to the order Cetacea, which also includes whales and porpoises. Sleek and powerful swimmers, dolphins are found in seas throughout the world; some inhabit freshwater rivers and lakes. Characteristic features of most dolphins are long snouts with rows of sharp teeth, and rounded foreheads with a nostril on top, known as the blowhole.There are at least 40 species of dolphins. Dolphins resemble fish in many ways, but they exhibit a number of true mammalian characteristics: They are warm-blooded, breathe air, and nurse their young on milk. Dolphins and porpoises have a similar appearance, but dolphins can be distinguished from porpoises by their more prominent snouts and conical teeth. Porpoises have blunt snouts, chisel-shaped teeth, and a stouter body than dolphins.Sailors have long considered the presence of dolphins cruising alongside the bows of ships as a good omen and a promise of fair weather. Dolphins also figure prominently in folklore, often appearing in works of art, on coins and currency, and on stamps. Ancient Greek coins depicted the son of Poseidon seated on a dolphin, and the ancient Roman author Pliny the Elder wrote a story of a dolphin that carried a poor man’s son to school each day. Many classical writers described how dolphins harnessed to chariots helped maidens in distress. A dolphin was on the coat of arms of the dauphin, the title given the eldest son and heir of the king of France.Dolphins throughout the world are threatened by habitat destruction and pollution. Many cultures have hunted dolphins for food and for the oil found in small quantities in the animal’s head. (The oil was once widely used as a lubricant.) Although the hunting of dolphins greatly declined in the 20th century, many dolphins are still killed inadvertently when they become entrapped in huge nets used to catch tuna.
魔羯女悠悠
海豚 - Dolphin ^_^- Dolphins belong to the order of whales.All dolphins, porpoises, and whales belong to the order Cetacea. They are often called cetaceans. Scientists group most dolphins (31 species) in the family Delphinidae, part of the suborder Odontoceti, or toothed whales. Delphinids include such well known dolphins as bottlenose dolphins and common dolphins as well as killer whales and pilot whales.Another cetacean family, Plantanistidae, contains the river dolphins: small-eyed, long-snouted dolphins that live in fresh water. Porpoises belong to their own family, Phocoenidae. Porpoises are different than dolphins. They have shorter snouts, trangular tops fin, and spade-shped teeth. This fact sheet focuses on dolphins in the family Delphinidae- Dolphins live in all oceans.Dolphins live in all oceans of the world. While some inhabit one particular geographical area of an ocean, others like killer whales are found worldwide. Coastal, or inshore, dolphins live close to land and are often seen by people on beaches and boats. Oceanic, or offshore, dolphins live farther out at sea. Many dolphins have a homerange, an area where they tend to stay.
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