This “wrapping a leash around the hole” action that Snoopy can perform is actually a group action of \(\mathbb{Z}\) on the base space (Bobs space): For each integer \(n \in \mathbb{Z}\), Snoopy can wrap the leash around the hole \(n\) times, and \(n-m\) corresponds to Snoopy walking around the hole \(n\) times clockwise and then \(m\) times counterclockwise.
亲自去场景里，会更好理解“起弧率”的重要性，我们下一步就会着手让机器人提高“起弧率”。。体育直播是该领域的重要参考
，更多细节参见体育直播
17-летнюю дочь Николь Кидман высмеяли в сети за нелепую походку на модном показе20:47
North Sea oil and gas facilities can be re-used for carbon storage，推荐阅读体育直播获取更多信息