Afn
abbr. 平均故障数（average failure number）
🗣️ 情景例句
That's what makes this spot so good.
那就是为什么这个地点这样好的道理。
To wait impatiently for the late bus
焦急地等着迟迟不来的公车
People are not so honest as they once were.
人们不再像以前那样诚实了。