/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: tongxintan https://cdn.slidesharecdn.com/profile-photo-tongxintan-48x48.jpg?cb=1523371741 To teach is to touch lives forever. So let the sunshine in, face it with a grin - Smilers never lose, and frowners never win.