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.
预告中，曾燕红回忆了自己当时登上珠峰的过程，并称当时唯一不能做的就是放弃。
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在这个节点上，我们看到的不仅是适应症的扩张，更是临床逻辑的改变与技术路线的肉搏，不久前FDA释放的灵活监管信号，更是为这场变革按下加速键。
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