Henry wants to borrow a book from the library. He comes to the library with his classmates. They can't see any assistant in it, but only some robots are standing there. Henry says to the robot,"Hey, give me a book on music." But the robot doesn't move.
Then another student tells Henry,"You must say"Exxuse me" and "Please" first when you want some help." Henry does so and the robot brings the book. But Henrary can't get the book from the robot's hands. He thinks for a moment, then he says a word to the robot. The robot gives him the book. Henry gets the book and goes home happily.
的意思，谢谢