For example, if you found a file with a strange extension how can you open it?

例如，如果你发现一个文件有一个奇怪的后缀的话该如何打开？

youdao

Quality - of - service extension for Open Shortest Path First?

首先用于公开最短路径的服务质量扩展QOSPF ？

youdao

Quality - of - service extension for Open Shortest Path First?

首先用于公开最短路径的服务质量扩展QOSPF ？

youdao