/ http://www.slideshare.net/images/logo.gif / 狠狠撸Share feed for 狠狠撸shows by User: laozhen https://cdn.slidesharecdn.com/profile-photo-laozhen-48x48.jpg?cb=1522854600 吾生也有涯，而知也无涯，以有涯随无涯，殆已。