In the vast ocean live many creatures with great intellectual and physical capacities. dolphin is one of those great creatures, whose capacities to think and move at an astounding rate puzzle those who study their behaviors, dolphins possess something that makes them different from all the other sea creatures. it is not strength or speed but the size of their brains. dolphin' s brain is almost the same size as that found in the human head. they live for a ling time.
大海里住着许多智力发达、身体强健的动物，海豚就是其中之一。它反应灵敏、动作迅速，让那些研究它们行为的人们深感震惊。海豚拥有一些与其它海洋生物不同的地方，它的优势不在于它的力量和速度，而在于它的大脑。海豚的大脑与人脑大小一样大。它们的寿命很长。

Dolphins' babies are born in the water. they can grow up to three and a half meters long.
海豚在水里生育，它们能长到三点五米长。
Dolopins use sound to help them find their way, look for their food and talk with each other. sound is just like their eyes and mouths.
海豚利用声音帮助自己认路、觅食与彼此之间交谈。声音就像它们的眼睛和嘴一样。