Hi,I am.... Let me tell you something about the picture. Look,there are three boys. One is in a motorcycle. Another is in an airplane. Another is in a rocket. They are taling about which vehicle(交通工具)is the slowest. The airplane is slower than the rocket. The motorcycle is slower than the airplane. So the motorcycle is the slowest, and the rocket is the fastest. The boys don't care which is slow and which is fast. They are all very happy.