Into a very interesting dialogue from "Pean Beans"
Today, in the bus, hear a pair of pupils.
"Mom, why don't anyone buy a ticket?"
"This is a non-ticket sales car, when I got on the bus, I died in the coinbox in the front of the car, then we got off the door at this door."
"Mom, why do you want to say two times?"
"Because I want to write people not to take the station?"
"What is the station?"
"That is to say, I have to get off at this station, the result is in the back of the station."
"Why do you want to say two times?"
"I am afraid that some people have not heard it."
"...?"
"..."
Suppose we have to develop a bus station system, what will our demanders often do?
