x No Plagiarism!91gfYNc7NvAlfVvDSfwYposted on PENANA 1,000,000粒沙子是一個丘,649Please respect copyright.PENANAZuopZoJ3zm一個丘減掉一粒沙子還是一個丘 ,649Please respect copyright.PENANA9FoX6t7oNY假如一直重複這清況的話(每次都減掉一粒沙子),到了最後會是一個丘等於一粒沙子嗎?216.73.216.185ns216.73.216.185da2