/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: xwengj https://cdn.slidesharecdn.com/profile-photo-xwengj-48x48.jpg?cb=1523484556 www.flickr.com/xiangweng "Utopia is not unachievable, it is unachieved" -Theódore Monod-