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
And nice meeting you, too, Mrs. Tobin.
我也很高兴见到你，Tobin太太。
He is a doctor. He has his own practice.
他是个医生，他自己开业。
In it there was a boatman fast asleep.
船上有一船夫在呼呼大睡。