x No Plagiarism!T7mCurv4CxNIWDrbyyZqposted on PENANA 1,000,000粒沙子是一個丘,472Please respect copyright.PENANA1bniQjN6ov一個丘減掉一粒沙子還是一個丘 ,472Please respect copyright.PENANA7iQmNndEGG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? 172.70.100.84ns 172.70.100.84da2