/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: arclum https://public.slidesharecdn.com/v2/images/profile-picture.png If you help others,you wiil be helped, perhaps tomorrow, perhaps in one hundred years, but you will be helped. nature must pay off the debt........ it is a mathematical law & all life is mathematicals.