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
Are all these goods made in your factory?
所有这些货物都是贵厂生产的吗？
I don't know how to do that.
我不知道该怎么打。
We're going to watch a football game. Would you like to come too?
我们打算看一场足球赛。你也来好吗？