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
Let me give you a little fatherly advice.
让我像父亲般给你提点建议。
I am sorry you feel sad.
抱歉，让你伤心了。
I have never been able to look at a snail since then.
从那以后，我再也不能看一眼蜗牛了。