Listening to the rain can have two realms, one is elegant pleasure, and the other is melancholy and inexplicable sadness. The intermittent sound of rain added to the sadness. Teenagers listen to the rain is the former, prime of life and "now" are the latter, and "now" is deeper. The meaning of "one term" is really unbearable and hard to cherish. Although it seems to be enlightened and detached, in fact, I still can't get rid of it, and things are unforgettable-national affairs and family affairs are unforgettable.