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
My account number is ...
我户头号码是…
What year is this?
今年是哪一年？
Man-made satellites have been sent up into space by many countries.
许多国家都成功地把人造卫星送入了太空。