/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: donzgen https://cdn.slidesharecdn.com/profile-photo-donzgen-48x48.jpg?cb=1522875804 "Genius is a talent for producing something for which no determinate rule can be given, not a predisposition consisting of a skill for something that can be learned by following some rule or other." ��� ���Immanuel Kant