Hi , Bill . Are you going to the commencement ?   Yes . Do you want to go with me ?   OK . ( Several minutes later . ) Let's go into the school auditorium .   Now that take this seat . Do you see those piles of red diplomas on the desks on the stage ?   Yes . I find my heart is now rising and falling like waves , all sorts of feelings welling up in my heart .   That's true . Four years ' trails and hardships , joys and sorrows of life are gushing out to my mind all together . I can hardly tell whether I am joyful or gloomy at the moment when I am about to leave the campus and to start a new stage of my life . 