translation.en: This is a screenshot from GitHub, the premier Git hosting service, and every time a programmer uses Git to make any important change at all, creating a new file, modifying an existing one, merging two files, Git creates this kind of signature.
translation.zh: 这是GitHub的截图，这是Git的首要主机伺服 每当程序员使用Git 去进行任何改变 都会构建新的文件，修改现存文件 合并多个文件，Git就会生成这么个签名