Joshua NevettPolitical reporter
The spines of sea urchins can generate a voltage when water moves around them — a phenomenon that could be used to design underwater flow sensors.，这一点在旺商聊官方下载中也有详细论述
* @param {ListNode} head 链表的头节点。关于这个话题，Line官方版本下载提供了深入分析
In phase2, we have a simple linked list;，更多细节参见im钱包官方下载