Title Text:Ground-pole-ball-pole can be fun if you shake the first pole to get the second one whipping around dangerously, but the ball at the joint gets torn apart pretty fast. Origin:https://xkcd.com/2663/ https://www.explainxkcd.com/wiki/index.php/2663:_Tetherball_Configurations 绳球组合 地-杆-球-杆这种组合也挺好玩，你使劲摇晃第一根杆，就能带动第二根杆跟着张牙舞爪地晃起来，不过玩不了多久中间那个球就得裂开。 http://xkcd.in/comic?lg=cn&id… Read more