x No Plagiarism!iJFDW9IC0ZH2eBr8ESBKposted on PENANA 1,000,000粒沙子是一個丘,621Please respect copyright.PENANAsvMj24lz4x一個丘減掉一粒沙子還是一個丘 ,621Please respect copyright.PENANASKoE48RTcF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?3.17.159.53ns3.17.159.53da2