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
Is this all Grandpa's stuff?
这里面都是爷爷的东西吗？
Mock not a cobbler for his black thumbs.
不要嘲笑皮匠的黑拇指。
The plane was then able to rise and it cleared the mountains by 400 feet.
于是飞机可以上升了，它在离山头400英尺的高度飞越了过去。