摘要：
Description Because of the wrong status of the bicycle, Sempr begin to walk east to west every morning and walk back every evening. Walking may cause 阅读全文
摘要：
Description The Borg is an immensely powerful race of enhanced humanoids from the delta quadrant of the galaxy. The Borg collective is the term used t 阅读全文
摘要：
Description Imagine you are standing inside a two dimensional maze composed of square cells which may or may not be filled with rock. You can move nor 阅读全文