2. 按步长分组，对每组进行插入排序
"We also ask all those who are engaging in acts of vandalism in this area to refrain from doing so and to respect the mourning and grief we are experiencing at this difficult time."
，这一点在Line官方版本下载中也有详细论述
Source: https://firebase.google.com/support/guides/security-checklist#api-keys-not-secret
团队还展示了多束并行写入技术，使写入吞吐量提升至 65.9Mbit/s，并预计未来可扩展至数百束。