People call Earth the"water planet". That's because the ocean (海洋) covers over 70 percent of Earth. It helps us in many ways.
The ocean is like Earth's lungs (肺). Also,the ocean takes in (吸收) 50 times more carbon dioxide(CO2) than our atmosphere(大气层).
There are some canals(运河) in the oceans. By using these canals,people can move things from one country to another. Thanks to the canals,you can have all kinds of chocolate from other different countries.
It takes in and stores heat(储存热量) from the sun. Then the water in the ocean carries that heat around Earth. Without oceans,Earth would be an icy rock. Also,the ocean helps keep places from getting too hot or too cold.
Besides,the ocean gives us different kinds of food. And we need to protect our ocean.
A. This is usually cheaper than moving things by plane.
B. We can enjoy lots of seafood and vegetables.
C. The ocean is very important.
D. It is easy to send things by canal.
E. It makes over half of the world's oxygen(氧气).
F. The ocean also keeps Earth warm.
G. The ocean is the biggest part of Earth.