/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: davidyslau https://cdn.slidesharecdn.com/profile-photo-davidyslau-48x48.jpg?cb=1523360906 Òª²»ÊÇͣ늵ÄÒ»Ò¹ ²Å°l¬FÎÒ¼Åį¿Õ¶´