return urls, next_url
圖像來源，Serenity Strull/ BBC
，详情可参考快连下载-Letsvpn下载
3. 步长逐渐减小，最后步长为1时就是普通插入排序
"How far back in time can you understand English?", a post that tells a story starting with the English of 2000 AD and ending with the English of 1000 AD has gone viral, and gotten a lot of people interested in older forms of English.