Bfd
abbr. 双向转发检测机制（Bidirectional Forwarding Detection）；发现路由器转发故障的新协议；二进制文件描述符（Binary File Descriptor）
🗣️ 情景例句
That's all right.
没关系。
What are you thinking about?
你正在考虑什么？
Ice is only as safe as the water from which it is made,
冰块只有当制造冰块的水安全时才是保险的，