/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: imaddawas https://cdn.slidesharecdn.com/profile-photo-imaddawas-48x48.jpg?cb=1523365221 An optimist will tell you the glass is half-full; the pessimist, half-empty; and the engineer will tell you the glass is twice the size it needs to be