Sef
abbr. 海峡交流基金会（Straits Exchange Foundation）；严重误码帧（ Severely Errored Frame）；钠排泄因子（sodium excreting factor ）
🗣️ 情景例句
Oh, how do you do?
噢 你好吗?
I hope you get to the airport on time.
我希望你准时到机场。
We'll get it right out for you.
我们马上就出货。