求翻译：主要以小鱼、乌贼、虾、蟹为食。海豚的速度可达每小时40海里，相当于鱼雷快艇的中等速度…因为它的身体呈流线型，皮肤也有良好的弹性。 海豚是人类的朋友，它们十分乐意与人交往亲近是什么意思？

Mainly feed on small fish, squid, shrimp, crab. Dolphins speeds of up to 40 knots, equivalent to the medium speed of PT boats ... because it's a streamline body, the skin has good elasticity. Dolphins are friends of human beings, and they are very happy with the people close to

In fish, squid, shrimp, crabs for food. The Dolphin's speed up to 40 miles per hour, which is equivalent to a medium speed torpedo boats ... because it's body is streamlined, the skin is also a good stretch. Dolphin is a friend of mankind, and they 10 would be more than glad to interact with people

Mainly take the small fish, the cuttlefish, the shrimp, the crab as the food.Porpoise's speed may amount to each hour 40 nautical miles, is equal in the torpedo boat medium speed…Because its body assumes the streamline form, the skin also has the good elasticity. The porpoise is humanity's friends,

Mainly feed on small fish, squid, shrimp, and crab. Dolphin speeds up to 40 miles per hour, equivalent to medium-speed patrol torpedo boat ... Because its body is streamlined, also has a good elasticity of the skin. Dolphin is the friend of mankind, they are more than willing to communicate with peo