海豚英语怎么说要文章!100字左右
dolphinDolphins are marine mammals that are closely related to whales and porpoises.There are almost forty species of dolphin in seventeen genera.They vary in size from 1.2 metres (4 ft) and 40 kilograms (88 lb) (Maui's Dolphin),up to 9.5 m (30 ft) and ten tonnes (the Orca or Killer Whale).They are found worldwide,mostly in the shallower seas of the continental shelves,and are carnivores,mostly eating fish and squid.The family Delphinidae is the largest in the Cetacea,and relatively recent:dolphins evolved about ten million years ago,during the Miocene.Dolphins are considered to be amongst the most intelligent of animals and their often friendly appearance and seemingly playful attitude have made them popular in human culture
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