際際滷shows by User: rama450 / http://www.slideshare.net/images/logo.gif 際際滷shows by User: rama450 / 際際滷Share feed for 際際滷shows by User: rama450 https://cdn.slidesharecdn.com/profile-photo-rama450-48x48.jpg?cb=1717653031 The difference between an optimist and a pessimist is that an optimist thinks this is the best possible world. A pessimist fears that this is true.