/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: kirakillua1 https://cdn.slidesharecdn.com/profile-photo-kirakillua1-48x48.jpg?cb=1523517605 Yiwen Liang, ÁºÒÐö©