/ http://www.slideshare.net/images/logo.gif / 狠狠撸Share feed for 狠狠撸shows by User: eijahasu https://cdn.slidesharecdn.com/profile-photo-eijahasu-48x48.jpg?cb=1523508840 I don't know why we are here, but I'm pretty sure that it is not in order to enjoy ourselves. - Ludwig Wittgenstein - If knowledge can create problems, it is not through ignorance that we can solve them. - Isaac Asimov