Sfa
abbr. 苏格兰足球协会（Scottish Football Association）；空间频率分析仪（Spatial Frequency Analyzer）
🗣️ 情景例句
Since I retired,
自从我退休以后，
We are in the same boat, we both failed the exam.
我们都一样，考试都没及格。
What is it?
什么呢？