What swims in the water, but isn’t a fish?
What whistles and chirps , but isn’t a bird?
What loves to jump, but isn’t a frog?
It’s a dolphin!
A dolphin is a mammal, just like you. Dolphins look like fish, but they are different in some very important ways.
Fish have scales. Fish have gills. Gills help fish get oxygen from the water. Their tails bend from side to side. A fish’s body temperature matches the temperature of the water it’s in.
Dolphins have lungs and breathe air. They get oxygen through a hole on top of their heads. When a dolphin swims slowly, it rises to the surface and breathes once or twice a minute. When a dolphin swims fast, it leaps out of the water to catch its breath. When a dolphin breathes out, air blasts out of its blowhole at 100 miles an hour. Their tails move up and down. A dolphin’s body temperature is always about 36 degrees Celsius.
A dolphin’s body is just right for life underwater.
The fin on a dolphin’s back helps it stay balanced.
Flippers help a dolphin start, stop, and turn.
Its powerful tail pushes it through the water.
喜欢你的声音!磁性富有魅力!
每天听着你睡觉觉
干货满满
期待
最喜欢这个感觉了
老师讲的太对了
这次有认真听不错
刚开始听到你的声音就喜欢上了
很喜欢这种美妙的声音
希望主播能够坚持每天上传一期节目,辛苦啦!