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
left to right.
从左到右轮流玩。
It doesn't make any difference.
没什么差别。
However, this does not always happen.
然而，情况并不都是这样，